The IRS announced yesterday that the filing (and payment) date for 2020 taxes has been bumped from the usual April 15 to May 17, 2021. See the IRS’ own post, here.
Importantly, the delay does NOT apply to estimated tax payments. As of this writing, you still have to make your estimated payment on April 15, 2021. Now, that may change, but don’t rely on that possibility: be prepared to pay on the usual date.
Also, it doesn’t apply to state taxes. Check on your own state to see if it has made changes.