Have you filed your 2019 tax return but the IRS sent a notice saying you didn’t?

You are not alone.  Some 260,000 taxpayers also did.  These notices are called CP59 notices.

The IRS has not finished processing 2019 returns due to COVID-19 delays and many of these notices were sent in error. The IRS has issued a news release saying these notices can be disregarded if you did in fact file your return.