Fill out Form 1120-S with Instafill.ai

Worried about filling PDFs wrong? Instafill securely fills 1120S forms, ensuring each field is accurate.
#1 AI PDF Filling Software of 2024
3 out of 4 customers say they prepare their Form 1120-S forms in 37 seconds or less
Secure platform for your PDF forms and personal information
main-image

Form 1120-S, U.S. Income Tax Return for an S Corporation free printable template

Fill out Form 1120S ✨Coming soon✨
Not filled your Form 1120-S yet?
Click here to automatically fill

Instafill Demo: filling out a legal form in 27 seconds

Compliance Form 1120-S
Validation Checks by Instafill.ai

1
Ensures Form 2553 is filed or attached if electing S corporation status for the first time
The software ensures that Form 2553 is properly filed or attached when an S corporation status is being elected for the first time. It checks for the presence of the form and verifies its completeness. If the form is missing or incomplete, the software flags this issue for the user's attention. This validation is crucial for maintaining compliance with IRS requirements for S corporation elections.
2
Verifies the correct tax year and dates are entered in the main form
The software verifies that the correct tax year and corresponding dates are accurately entered in the main form. It cross-references the current date with the tax year to ensure consistency and accuracy. Any discrepancies between the tax year and the dates provided are highlighted for correction. This check is essential to prevent filing errors that could lead to processing delays or penalties.
3
Confirms the corporation's name, address, and EIN are accurately provided
The software confirms that the corporation's legal name, address, and Employer Identification Number (EIN) are accurately provided on the form. It validates the EIN format and checks the address against standardized postal records. Any inaccuracies or inconsistencies in the corporation's identifying information are flagged for review. This validation helps to ensure that the tax return is correctly associated with the corporation.
4
Checks if the S election effective date, business activity code, date incorporated, and total assets are correctly filled
The software checks if the S election effective date, business activity code, date of incorporation, and total assets are correctly filled in the form. It ensures that the effective date aligns with the tax year, the business activity code matches the corporation's operations, the date of incorporation is in a valid format, and the total assets are reported accurately. This check is vital for the accurate representation of the corporation's status and financials.
5
Validates the appropriate boxes for final return, name change, address change, amended return, or S election termination are checked if applicable
The software validates that the appropriate boxes indicating a final return, name change, address change, amended return, or S election termination are checked if applicable. It ensures that these critical status indicators are not overlooked and that any checked boxes are consistent with the information provided throughout the form. This validation is important for the correct processing of the corporation's tax return and any related notifications.
6
Ensures the number of shareholders is entered and the boxes for aggregated or grouped activities are checked if relevant
The AI ensures that the total number of shareholders is accurately entered on the U.S. Income Tax Return for an S Corporation form. It checks that this number is not left blank and corresponds to the actual number of shareholders in the S Corporation. Additionally, the AI verifies that the boxes indicating whether the activities are aggregated or grouped are checked if applicable. This is crucial for accurate tax reporting and compliance with IRS regulations regarding the treatment of income and losses.
7
Confirms gross receipts or sales, returns and allowances are reported and the balance is calculated
The AI confirms that the gross receipts or sales are properly reported on the form, along with any returns and allowances. It ensures that these figures are accurately entered and that the balance is correctly calculated, reflecting the net amount of receipts or sales. This validation is essential for determining the correct taxable income of the S Corporation and ensuring that the reported figures align with the financial records.
8
Verifies Form 1125-A is attached for the cost of goods sold
The AI verifies the attachment of Form 1125-A, which is required for reporting the cost of goods sold by the S Corporation. It checks that this form is included with the tax return if the S Corporation has inventory and needs to account for the cost of goods sold. This step is vital for accurately calculating the gross profit and ensuring that the tax return is complete and compliant with IRS requirements.
9
Checks for the attachment of Form 4797 for net gain or loss and ensures other income or loss is reported
The AI checks that Form 4797 is attached to the tax return if there is a net gain or loss from the sale of business property. It ensures that any other income or loss that the S Corporation needs to report is properly documented on the tax return. This validation is important for capturing all sources of income and loss, which affects the overall tax liability of the S Corporation.
10
Validates that all deductions are listed and Form 1125-E, Form 4562, and Form 7205 are attached if required
The AI validates that all deductions the S Corporation is claiming are listed on the tax return. It checks for the attachment of Form 1125-E if compensation of officers is being reported, Form 4562 if the S Corporation is claiming depreciation and amortization, and Form 7205 if there are residential energy credits. This comprehensive validation ensures that all potential deductions are accounted for and that the necessary supporting documentation is included, which can affect the taxable income and potential savings for the S Corporation.
11
Ensures total deductions and ordinary business income or loss are calculated
The AI ensures that the total deductions are accurately summed and subtracted from the total income to calculate the ordinary business income or loss. It checks that all necessary expenses and potential deductions have been accounted for and are categorized correctly. The AI also verifies that the mathematical operations are performed correctly and that the resulting figure accurately reflects the company's financial activity for the tax year.
12
Verifies tax calculations including excess net passive income, LIFO recapture tax, and tax from Schedule D
The AI verifies that the tax calculations on the form are correct, including specific items such as excess net passive income, LIFO recapture tax, and any tax due from capital gains or losses reported on Schedule D. It ensures that the appropriate tax rates are applied to each item and that any necessary adjustments or carryovers from previous years are accurately reflected in the current year's tax calculations.
13
Confirms estimated tax payments, tax deposits, and credits are reported and Form 2220 is attached if applicable
The AI confirms that all estimated tax payments and tax deposits made during the year are accurately reported on the form. It checks that any applicable tax credits are claimed and properly documented. Additionally, the AI ensures that Form 2220 is attached if the corporation is subject to underpayment penalties and is required to show its computation for underpayment of estimated tax.
14
Checks if the amount owed or overpayment is determined and the election for credit or refund is indicated
The AI checks whether the form accurately reflects if there is an amount owed by the corporation or if there is an overpayment. It ensures that the form indicates the corporation's election to apply the overpayment to next year's estimated tax or to receive a refund. The AI also verifies that the calculations leading to the determination of owed or overpayment are correct and based on the provided financial data.
15
Ensures the officer's signature, date, and title are present in the signature section
The AI ensures that the signature section of the form is duly completed with the officer's signature, the date of signing, and the officer's title. It checks for the presence and legibility of these elements, confirming that the form is authorized and executed by an individual with the proper authority to do so on behalf of the S Corporation. The AI also verifies that the date of signing is within the appropriate tax filing period.
16
Validates that the paid preparer's information is complete if the form was prepared by a third party
The AI ensures that all fields related to the paid preparer's information are fully completed if the U.S. Income Tax Return for an S Corporation has been prepared by someone other than an employee of the S Corporation. It verifies that the preparer's name, address, and identification numbers are present and correctly formatted. The system also checks for the inclusion of the preparer's signature and date of signing, confirming that these essential attestations are not overlooked. Additionally, the AI cross-references the preparer's information with known databases to ensure validity and to prevent any fraudulent entries.

Common Mistakes in Completing Form 1120-S

Failing to attach Form 2553 is a critical error as it is the document that elects the corporation to be taxed as an S corporation. Without this form, the IRS will not recognize the S corporation status, and the entity may be taxed as a C corporation by default. To avoid this mistake, ensure that Form 2553 is completed accurately and attached to the tax return before submission. Double-check the attachment requirement in the instructions for the tax return and keep a copy of the form for your records.

Entering the wrong tax year or incorrect dates can lead to processing delays and potential penalties. It is essential to verify the tax year and any relevant dates before submitting the tax return. Cross-reference these details with the company's fiscal calendar and any official IRS documentation for the tax year in question. If the corporation operates on a fiscal year basis, ensure that the dates align with the fiscal period. Always review the form for accuracy before filing.

Omitting the corporation's name, address, or Employer Identification Number (EIN) can result in the IRS being unable to properly identify the filing entity, which may delay processing and could lead to inadvertent penalties. To prevent this, double-check that all identification information is present and correct. Use the corporation's legal name as registered with the IRS, ensure the address is current and matches IRS records, and verify the EIN against official documents or previous tax filings.

The S election effective date is crucial as it informs the IRS of when the corporation wishes to be treated as an S corporation. Neglecting to fill in this date can cause confusion about the tax status of the entity. To avoid this oversight, confirm the intended effective date of the S corporation election and clearly enter it on Form 2553. If unsure about the effective date, consult the IRS guidelines or a tax professional for clarification.

If the corporation is electing S status for the first time, it is important to indicate this on the tax return. Failure to do so may lead to the IRS treating the return as if the corporation is not an S corporation. To prevent this mistake, review the instructions for the tax return carefully and ensure that any box or section that requires indication of a first-year election is completed accurately. Keep records of the initial S corporation election to reference in future tax filings.

Failing to indicate a final return, name change, or address change on the U.S. Income Tax Return for an S Corporation can lead to processing delays and incorrect records. To avoid this mistake, carefully review the form before submission to ensure that all applicable boxes are checked if the corporation has finalized its activities, changed its name, or moved to a new location. Double-check the form instructions for the specific location of these boxes, as they may not be immediately noticeable. Keeping the IRS informed of these changes is crucial for accurate and timely communication.

Reporting an incorrect number of shareholders can result in significant discrepancies in the allocation of income, deductions, and credits. It is essential to maintain accurate shareholder records throughout the year and to verify the shareholder count before filing the tax return. Utilize shareholder ledgers and ensure that any changes in shareholder status are updated promptly. Cross-reference the final shareholder count with the corporation's records to confirm accuracy before reporting on the tax return.

Neglecting to check the boxes for aggregated or grouped activities can lead to improper reporting of income and expenses, which may affect the tax liability of the corporation. It is important to understand the IRS regulations regarding aggregation and grouping of activities, especially for S corporations with multiple business operations or rental activities. Review the specific instructions for these sections on the tax return and consult with a tax professional if necessary to ensure that all relevant activities are correctly reported as aggregated or grouped, as this can have significant tax implications.

Inaccurate reporting of gross receipts or sales can result in incorrect tax calculations and potential penalties. Ensure that all financial records are reconciled and reviewed for accuracy before completing the tax return. Implement a thorough record-keeping system that captures all sales transactions throughout the year. Cross-verify the total gross receipts or sales with bank statements, sales ledgers, and other financial documents. It is also advisable to have an accountant or financial officer review the figures to confirm their accuracy before filing.

Omitting Form 1125-A for the cost of goods sold when required can lead to an incomplete tax return and may delay processing. If the S corporation sells goods, it is imperative to complete and attach Form 1125-A to accurately report the cost of goods sold. Review the IRS requirements to determine if your corporation needs to file this form, which is generally required if the gross receipts are over a certain threshold. Keep detailed records of inventory and cost of goods throughout the year to facilitate the completion of Form 1125-A, and ensure it is attached to the tax return upon filing.

Miscalculating gross profit or net gain/loss can lead to significant discrepancies in the reported income of an S Corporation. To avoid this mistake, ensure that all revenue and cost of goods sold are accurately reported and calculated. Double-check the arithmetic operations and consider using accounting software to minimize human error. It is also advisable to have the calculations reviewed by a professional accountant before submitting the tax return.

Failing to include all sources of other income or loss and the total income can result in an incorrect tax liability. To prevent this, carefully review all financial records for the fiscal year to identify any additional income or losses that may not be immediately apparent. Ensure that all income, regardless of its source, is reported on the tax return. Cross-reference the total income with the company's financial statements to confirm accuracy.

Submitting an incomplete list of deductions or failing to attach required documentation can lead to the rejection of legitimate deductions. To avoid this, compile a comprehensive list of all potential deductions throughout the year and gather supporting documentation as you go. Before filing, check the tax return instructions for a list of required attachments and ensure that all relevant forms and schedules are included with your submission.

Incorrectly calculating total deductions can impact the ordinary income or loss reported by an S Corporation. To prevent miscalculations, itemize deductions carefully and verify each amount against supporting documents. Use tax preparation software or consult with a tax professional to ensure that all deductions are calculated correctly and in accordance with current tax laws. Regularly update financial records to facilitate accurate deduction tracking.

Reporting incorrect excess net passive income or LIFO (Last-In, First-Out) recapture tax can lead to an inaccurate tax assessment. To avoid this error, thoroughly understand the definitions and conditions under which these items apply to your S Corporation. If applicable, calculate the excess net passive income and LIFO recapture tax meticulously, following the IRS guidelines. It may be beneficial to seek assistance from a tax professional who is experienced with S Corporation tax requirements.

Incorrect reporting of tax from Schedule D on an S Corporation tax return can lead to discrepancies in the calculation of the corporation's tax liability. To avoid this mistake, ensure that all capital gains and losses are accurately recorded and that the Schedule D tax calculation is double-checked for accuracy. Cross-reference the amounts reported on Schedule D with the corporation's financial records and consult with a tax professional if there are any uncertainties. It is also important to stay updated with the IRS guidelines regarding capital assets and taxation.

Neglecting to include estimated tax payments or deposits on the S Corporation tax return can result in an underpayment of taxes and potential penalties. To prevent this error, maintain accurate records of all estimated tax payments and deposits made throughout the year. Ensure that these payments are correctly entered on the tax return. It is advisable to use the Electronic Federal Tax Payment System (EFTPS) to track payments, and to review the corporation's estimated tax obligations regularly to make timely payments.

Failure to attach Form 4136 when claiming a fuel tax credit can lead to the credit being disallowed. To claim the credit correctly, complete Form 4136 with precise information about the fuel usage that qualifies for the credit. Attach the form to the S Corporation tax return when filing. Keep detailed records of all fuel purchases and usage to substantiate the claim, and consult the IRS instructions for Form 4136 to ensure compliance with the eligibility requirements for the fuel tax credit.

Miscalculating the estimated tax penalty or failing to attach Form 2220 can result in incorrect penalty assessments. To avoid this, use the IRS-provided methods for calculating the estimated tax penalty to determine if the corporation is subject to the penalty. If Form 2220 is required, complete it accurately and attach it to the tax return. Regularly review the corporation's estimated tax payments throughout the year to ensure they meet the IRS's safe harbor requirements and to minimize the risk of underpayment penalties.

Determining an incorrect amount owed or overpayment on the S Corporation tax return can affect the corporation's financial statements and tax liability. To ensure the correct amount is reported, reconcile the tax return figures with the corporation's accounting records. Verify all calculations and tax credits claimed, and review the IRS instructions for the proper reporting of payments and credits. If an overpayment is determined, decide whether to apply it to the next year's estimated tax or request a refund, and clearly indicate this choice on the return.

The U.S. Income Tax Return for an S Corporation requires the signature of an authorized officer, along with the date and their title. Failure to include any of these elements can result in the return being considered invalid. To avoid this mistake, double-check the signature section before submission to ensure that all required information is present. It is also advisable to have a checklist of required fields to be completed as part of the filing process.

Taxpayers have the option to authorize the IRS to discuss their return with the paid preparer. This authorization is crucial for addressing any issues or questions that may arise during processing. Neglecting to indicate this authorization can hinder communication and delay resolution of tax matters. To prevent this oversight, review the section regarding IRS discussion authorization carefully and make a clear indication of your preference on the form.

The 'Paid Preparer Use Only' section must be fully completed by the individual preparing the tax return if they are compensated for their services. An incomplete section can lead to processing delays and potential penalties. Ensure that the preparer includes their name, address, Preparer Tax Identification Number (PTIN), and other relevant information. Preparers should verify that all fields are filled out accurately before submitting the tax return.

Selecting the incorrect accounting method on Schedule B of the tax return can lead to an inaccurate representation of the corporation's financial situation. This mistake can affect the tax liability and potentially trigger an audit. To avoid this error, carefully determine the accounting method that the corporation uses—cash, accrual, or other—and ensure that the corresponding box is checked correctly. Consult with a tax professional if there is any uncertainty regarding the appropriate accounting method.

Providing complete information about the corporation's business activity and the products or services it offers is essential for proper tax classification and assessment. An incomplete description can lead to incorrect tax treatment. To ensure accuracy, provide a detailed and clear description of the primary business activity, including the specific products or services offered. Review this information for completeness and clarity before filing the return.

Schedule B contains specific questions that must be answered accurately to reflect the S Corporation's eligibility and compliance with tax regulations. Inaccurate responses can lead to incorrect tax treatment or IRS inquiries. To avoid this mistake, carefully read each question and consult the IRS instructions for Schedule B. Ensure that all answers are consistent with the corporation's financial and operational status. If uncertain about how to answer a question, seek advice from a tax professional.

Schedule K requires the S Corporation to report each shareholder's pro rata share of income, deductions, and credits. Omitting or incorrectly reporting these items can result in shareholders misreporting their personal tax returns. To prevent this error, double-check the allocations to ensure they accurately represent each shareholder's ownership percentage. Use the corporation's accounting records as a guide and reconcile the amounts reported on Schedule K with the corporation's total income and expenses.

Schedule L is a balance sheet for the corporation's assets, liabilities, and equity at the beginning and end of the tax year. Common errors include misclassification of accounts or incorrect balances. To avoid these mistakes, ensure that all accounts are classified according to generally accepted accounting principles (GAAP). Verify that the beginning balances match the ending balances from the prior year's Schedule L and that the current year's ending balances are accurate and complete.

Schedule M-1 reconciles the financial statement income with the tax return income. Errors often occur when there are discrepancies between book and taxable income not properly adjusted. To prevent reconciliation errors, maintain a detailed record of all book-to-tax differences throughout the year. Review the corporation's income statement and tax return carefully, ensuring that all adjustments are made and clearly explained on Schedule M-1.

Schedule M-2 analyzes the adjustments to the corporation's accumulated adjustments account, other adjustments account, and shareholders' undistributed taxable income previously taxed. Inaccuracies here can lead to misstated shareholder equity. To avoid errors, review the corporation's retained earnings and distributions throughout the year. Ensure that all transactions affecting equity are recorded and reflected accurately on Schedule M-2. Reconcile the schedule with the corporation's books to confirm accuracy.

Failing to review the entire U.S. Income Tax Return for an S Corporation form before submission can lead to errors or omissions that may result in processing delays or incorrect tax assessments. It is crucial to double-check all entries for accuracy, including the calculations, the taxpayer's information, and the consistency of data across related forms and schedules. Taxpayers should ensure that all necessary sections are completed and that the information provided aligns with their financial records. To avoid this mistake, it is recommended to take the time to go through the entire form after filling it out, and if possible, have another person review it as well to catch any potential errors.
Saved over 80 hours a year

“I was never sure if my IRS forms like W-9 were filled correctly. Now, I can complete the forms accurately without any external help.”

Kevin Martin Green

Your data stays secure with advanced protection from Instafill and our subprocessors

Robust compliance program

Transparent business model

You’re not the product. You always know where your data is and what it is processed for.

ISO 27001, HIPAA, and GDPR

Our subprocesses adhere to multiple compliance standards, including but not limited to ISO 27001, HIPAA, and GDPR.

Security & privacy by design

We consider security and privacy from the initial design phase of any new service or functionality. It’s not an afterthought, it’s built-in.

Fill out Form 1120-S with Instafill.ai

Worried about filling PDFs wrong? Instafill securely fills 1120s forms, ensuring each field is accurate.