15 January — 4th quarter 2020 estimated taxes are due
? January —The IRS will begin accepting e-filed tax returns
31 January —Deadline to provide a 1099-NEC to contractors you paid during 2020
15 April — 1st quarter 2021 estimated taxes are due
15 April — File your 2020 individual income tax return on Form 1040 and pay any tax due
15 June — 2nd quarter 2021 estimated taxes are due
15 June — U.S. citizens, resident aliens, and military personnel living and working outside the United States and Puerto Rico, file Form 1040 and pay any tax, interest, and penalties due
15 September — 3rd quarter 2021 estimated taxes are due
15 October — If you received an automatic 6-month extension to file your 2020 income tax return, file Form 1040 and pay any tax, interest, and penalties due
You will be charged interest on any amount not paid by the regular 15 April deadline until the date the tax is paid.
If you’re serving in a combat zone and return home after the 15 April deadline, you’re allowed an extension of 180 days from the date you returned home plus the number of days between 1 Jan – 15 April you were in a combat zone.