I received a letter for my 2018 tax return. The IRS is indicating that I did not file it. The status on TurboTax shows it was rejected. Please advise of next steps.
I mailed 2021 & 2022 returns separately, waited 10wks, IRS didn't get them. Sent them again USPS tracking shows delivered 5/13/24. IRS got 2021 but not 2022. Now what?