March 1 – Farmers and Fishermen
File your 2023 income tax return (Form 1040 or 1040-SR) and pay any tax due. However, you have until April 15 (April 17 if you live in Maine or Massachusetts) to file if you paid your 2023 estimated tax by January 16, 2024.
March 1 – Applicable Large Employers (ALE) – Forms 1095-B and 1095-C
If you are an Applicable Large Employer, provide Forms 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. See the Instructions for Forms 1094-B and 1095-B and the Instructions for Forms 1094-C and 1095-C for more information about the information reporting requirements.
March 15 – Partnerships
File a 2023 calendar year return (Form 1065). Provide each partner with a copy of their Schedule K-1 (Form 1065), Partner’s Share of Income, Deductions, Credits, etc., or a substitute Schedule K-1 and, if applicable, Schedule K-3 (Form 1065) or substitute Schedule K-3 (Form 1065). If you want an automatic 6-month extension of time to file the return, file Form 7004. Then file Form 1065 and provide Schedules K-1 or substitute Schedules K-1, and if applicable Schedules K-3, to the partners by September 16.
March 15 – S-Corporations
File a 2023 calendar year income tax return (Form 1120-S) and pay any tax due. Provide each shareholder with a copy of Schedule K-1 (Form 1120-S), Shareholder’s Share of Income, Deductions, Credits, etc., or a substitute Schedule K-1 (Form 1120-S) and, if applicable, Schedule K-3 (Form 1120-S) or substitute ScheduleK-3 (Form 1120-S).
To request an automatic 6-month extension of time to file the return, file Form 7004 and pay the tax estimated to be owed. Then file the return; pay any tax, interest, and penalties due; and provide each shareholder with a copy of their Schedule K-1 (Form 1120-S) and, if applicable, Schedule K-3 (Form 1120-S) by September 16.
March 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 2024. If Form 2553 is filed late, S treatment will begin with calendar year 2025.
March 15 – Social Security, Medicare and Withheld Income Tax
If the monthly deposit rule applies, deposit the tax for payments in February.
March 15 – Non-Payroll Withholding
If the monthly deposit rule applies, deposit the tax for payments in February.
Weekends & Holidays:
If a due date falls on a Saturday, Sunday or legal holiday, the due date is automatically extended until the next business day that is not itself a legal holiday.
Disaster Area Extensions:
Please note that when a geographical area is designated as a disaster area, due dates will be extended. For more information whether an area has been designated a disaster area and the filing extension dates visit the following websites:
FEMA: https://www.fema.gov/disaster/declarations
IRS: https://www.irs.gov/newsroom/tax-relief-in-disaster-situations