What do I do if the IRS has cashed my check but says they have no record of a processed tax return for 2019?

[DoninGA]

Follow the instructions on the IRS letter you received.  If they requested you to mail the tax return, then print the tax return and mail to the address listed on the notice or mail to the address relevant to your state of residence.

To access your current or prior year tax returns sign onto the TurboTax website with the userID you used to create the account - https://myturbotax.intuit.com/

Scroll down to the bottom of the screen and on the section Your tax returns & documents click on Show.  Click on the Year and Click on Download/print return (PDF)

A 2019 tax return can only be printed and mailed, it cannot be e-filed.

Print, sign, date and mail the tax return to the IRS.  Include with the mailed return any forms W-2 and 1099 which have taxes withheld.  Go to this IRS website for mailing addresses - https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment

[music39west]

Thank you very much!  I did not receive a letter.  I found the mistake while searching for a tax return transcript for proof of marital status for health insurance.  Can I just send them the signed tax return with the documents you mentioned along with front/back copy of the canceled check?  Then do I attach a note about the situation to the return?

[DoninGA]

Just mail the 2019 federal tax return, Form 1040, and any supporting forms or schedules which have an Attachment Sequence Number located in the upper right corner of the form or schedule along with any W-2's and/or Form 1099's you received.

It is not necessary to include a copy of the cancelled check or an explanation since the IRS knows that you have paid the taxes owed.  If the IRS has any questions concerning your tax return they will send you a letter in the mail.