March 1

Farmers and Fisherman - File your 2021 income tax return (Form 1040 or Form 1040-SR) and pay any tax due. However, you have until April 18 (April 19 if you live in Maine or Massachusetts) to file if you paid your 2021 estimated tax by January 18, 2022.

March 2

Health Coverage Reporting - If you are an Applicable Large Employer, provide Form 1095-C, Employer-Provided Health Insurance Offer and Coverage, to full-time employees. For all other providers of minimum essential coverage, provide Form 1095-B, Health Coverage, to responsible individuals.

March 10

Employees who work for tips - If you received $20 or more in tips during February, report them to your employer. You can use Form 4070.

March 15

Employers - Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in February.

Employers - Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in February.

Partnerships - File a 2021 calendar year income tax return (Form 1065). Provide each partner with a copy of their Schedule K-1 (Form 1065-B) or substitute Schedule K-1. To request an automatic 6-month extension of time to file the return, file Form 7004. Then file the return and provide each partner with a copy of their final or amended (if required) Schedule K­1 (Form 1065) by September 15.

S Corporations - File a 2021 calendar year income tax return (Form 1120S) and pay any tax due. Provide each shareholder with a copy of Schedule K-1 (Form 1120S), Shareholder's Share of Income, Credits, Deductions, etc., or a substitute Schedule K-1. If you want an automatic 6-month extension of time to file the return, file Form 7004 and deposit what you estimate you owe in tax. Then file the return, pay any tax, interest, and penalties due and provide each shareholder with a copy of their Schedule K-1 by September 15.

S Corporation Election - File Form 2553, Election by a Small Business Corporation, to choose to be treated as an S corporation beginning with calendar year 2022. If Form 2553 is filed late, S corporation treatment will begin with calendar year 2023.

March 31

Electronic Filing of Forms - File Forms 1097, 1098, 1099 (except Form 1099-NEC), 3921, 3922, and W-2G with the IRS. This due date applies only if you file electronically. The due date for giving the recipient these forms generally remains January 31.

Electronic Filing of Form W-2G - File copies of all the Form W-2G (Certain Gambling Winnings) you issued for 2021. This due date applies only if you electronically file. The due date for giving the recipient these forms remains January 31.

Electronic Filing of Forms 8027 - File copies of all the Forms 8027 you issued for 2021. This due date applies only if you electronically file.

Electronic Filing of Forms 1094-C and 1095-C and Forms 1094-B and 1095-B - If you're an Applicable Large Employer, file electronic forms 1094-C and 1095-C with the IRS. For all other providers of minimum essential coverage, file electronic Forms 1094-B and 1095-B with the IRS.