Form 990-T Filing Checklist for Tax Year 2021
Overview and Applicability
The 2021 Form 990-T retains the redesigned structure, which requires separate Schedule A forms for each unrelated trade or business. The Tax Cuts and Jobs Act provisions apply a 21% flat corporate tax rate for organizations taxable as corporations.
Organizations must track pre-2018 and post-2017 net operating losses separately, with post-2017 NOLs limited to 80% of taxable income and carrying forward indefinitely. Tax-exempt organizations under sections 501(c), 401(a), 408(e), 408A, 220(e), 529(a), 529A, or 530(a) with unrelated business taxable income must file for calendar year 2021 or fiscal years ending in 2021.
Ten-Step Filing Process
Step 1: Verify Status and Identify Unrelated Businesses
Confirm current tax-exempt status under the applicable IRC section. Complete the form header with the exemption code and number. Document any status changes during 2021. Identify all separate, unrelated trades or businesses and enter the total number in the header. Each activity requires its own Schedule A, unless it is properly aggregated.
Step 2: Gather Documentation for Each Business
Collect complete records, including gross receipts with invoices and bank statements, cost of goods sold records with beginning inventory, purchases, labor costs, section 263A costs, and ending inventory, expense documentation, including W-2s, compensation schedules, repair invoices, bad debt calculations, interest schedules, tax receipts, Form 4562 for depreciation, depletion calculations, deferred compensation records, employee benefit costs, partnership K-1s, rental agreements, debt-financed property records, and controlled organization documentation. Maintain separate files for each business.
Step 3: Complete Schedule A for Each Business
Prepare a separate Schedule A for each unrelated trade or business. Part I reports income: gross receipts less returns, cost of goods sold from worksheet, gross profit, capital gains with Schedule D attached, Form 4797 gains, partnership and S corporation income, rental income, debt-financed income, controlled organization income, investment income for section 501(c)(7), (9), or (17) organizations, exploited exempt activity income, advertising income, and other income. Total all income.
Part II captures deductions directly connected to business income, including officer compensation with a schedule, salaries and wages, repairs, bad debts, interest with schedules, taxes and licenses, depreciation from Form 4562 (less amounts claimed elsewhere), depletion, deferred compensation contributions, employee benefits, and other deductions with schedules. Total all deductions.
Calculate your income before a specific deduction by subtracting Part II from Part I. Apply NOL deductions, maintaining separate tracking: pre-2018 NOLs offset income fully subject to carryback/carryforward limits; post-2017 NOLs are limited to 80% of taxable income with indefinite carryforward. Apply a specific deduction of generally $1,000, allocating it among controlled group members if applicable. Calculate the UBTI for each business, ensuring that the amounts are zero or positive.
Step 4: Aggregate Schedule A Results
Complete all Schedule A forms, verifying accuracy. Confirm specific deduction allocation if part of a controlled group. Ensure each Schedule A shows zero or positive UBTI, as losses cannot offset income from other businesses. Sum UBTI from all Schedule A forms for the main form entry.
Step 5: Complete Part I of the Main Form
Transfer aggregate UBTI from all Schedule A forms to Part I. Calculate the charitable contribution deduction limited to 10% of UBTI before contributions. Gather contribution documentation verifying recipient qualifications under section 170. Enter the lesser of actual contributions or limitations. Reduce aggregate UBTI by allowable contributions to determine total UBTI subject to tax.
Step 6: Calculate Tax Liability in Part II
Corporations multiply the total UBTI by 21% for regular taxes. Trusts use the 2021 trust rate schedule, also known as Schedule D, from Form 1041. Organizations subject to the proxy tax under Section 6033(e) must calculate separately, with supporting schedules attached. Trusts determine AMT using Form 4626 if applicable. Include other taxes with supporting forms attached. Sum regular tax, proxy tax, AMT, and other taxes for total tax before credits.
Step 7: Claim Credits in Part III
Attach Form 1118 for the corporate foreign tax credit or Form 1116 for the trust foreign tax credit. Attach Form 3800 for general business credits. Attach Form 8801 for corporate minimum tax credit or Form 8827 for trust minimum tax credit. Attach Form 8941 for small employer health insurance premium credit. Do not claim prohibited credits, including earned income, child tax, or education credits. Total all credits and subtract from tax before credits for net tax.
Step 8: Report Other Taxes
Complete applicable recapture forms: Form 4255 for investment credit, Form 8611 for low-income housing credit, Form 8697 for long-term contract interest, Form 8866 for property depreciation interest. Report section 965 tax liability from Form 965-A or 965-B if applicable. Add the net tax after credits, other taxes, and the Section 965 tax to the total tax liability.
Step 9: Report Payments and Calculate Balance
Enter the 2020 overpayment credited to 2021. Report all 2021 estimated payments, including quarterly installments. Enter Form 8868 extension deposits. Report foreign withholding and backup withholding with Forms 1099 attached. Include Form 2439 credit, with Copy B attached, and Form 4136 fuel tax credit. Total all payments. Compare total payments against total tax.
Step 10: Calculate Penalty, Complete Disclosures, and Sign
Complete Form 2220 if an underpayment exists for organizations with a tax liability of $500 or more. Enter the penalty and attach the form. Calculate the balance due if the tax exceeds payments, or the overpayment if expenses exceed the tax. Elect to credit overpayment to 2022 or request a refund.
Complete Part IV, answering questions about at-risk limitations (line 1), excess business loss limitations (line 2), passive activity basis limitations (line 3), and whether aggregate UBTI was $10,000 or less (line 4).
Complete Part V, disclosing foreign financial accounts requiring possible FinCEN Form 114, foreign trust distributions requiring Form 3520 or 3520-A, and total tax-exempt interest received.
The authorized officer signs under penalty of perjury with a date and title. Indicate whether the IRS may discuss the return with the preparer. Paid preparers complete the section with signature, date, PTIN, firm information, and phone number.
Filing Requirements
Assemble the return with the main form, all Schedule A forms in order, and supporting schedules, including Forms 4562, Schedule D, 4797, cost of goods sold worksheets, compensation schedules, credit forms 1118/1116, 3800, 8801/8827, 8941, and Form 2220 if applicable, as well as other relevant documentation.
Calendar year: organizations file by May 16, 2022. Request an automatic six-month extension using Form 8868, extending the deadline to November 15, 2022, but not the payment deadline.
Section 401(a) trusts and IRAs are filed by the 15th day of the 4th month after the end of the year.
Consult the IRS's "Where to File" page for the correct mailing address. Electronic filing is encouraged through approved software. Use the Electronic Federal Tax Payment System for all payments. Do not mail payments with paper returns.
This checklist helps you correctly complete the 2021 Form 990-T, ensuring the correct format and adherence to tax rules for organizations that generate income from unrelated business activities.
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This checklist is for educational purposes only and does not constitute tax or legal advice. Always review official IRS instructions and consult a qualified professional for guidance.

