The IRS sent email or a letter? The IRS does not email. They only mail letters. If you got a letter what is the CP or LTR number at the top? Where does it say 2020? Did you file 2020, was it Accepted, did you get the 2020 refund?
If you got a email it might be a scam.
1400 is for the 3rd Stimulus payment for each person. It is on 1040 line 30. Line 30 is only if you didn't get the full amount or qualify for more. The 1400 Stimulus payment came out last year starting in March 2021. Did you get it?
If you claimed a missing stimulus payment on your return but the IRS took it off you have to ask the IRS. They think they already sent it to you. Maybe it went to an account you don't remember. Or you got a check or a card. It was probably easy to miss the debit card in the mail and think it was junk mail. They have to put a trace on it.
Double check your bank statements and Check your IRS account to see when and what they sent you (check both spouse's accounts if married)
Your Online Account | Internal Revenue Service
