Updated: Mar 18, 2021
Per IRS IR-2021-59, the IRS has extended the due for 2020 tax returns and tax payments from April 15, 2021 to May 17, 2021.
"Individual taxpayers can also postpone federal income tax payments for the 2020 tax year due on April 15, 2021, to May 17, 2021, without penalties and interest, regardless of the amount owed. This postponement applies to individual taxpayers, including individuals who pay self-employment tax. Penalties, interest and additions to tax will begin to accrue on any remaining unpaid balances as of May 17, 2021. Individual taxpayers will automatically avoid interest and penalties on the taxes paid by May 17."
Estimated taxes for the first quarter are still due April 15, 2021.
State tax returns may be extended to the same due date since most states base their returns on the Federal return. California has also extended the due date.