That's close to 2,400. That is probably for the first 2 Stimulus payments. Did you have an amount on 1040 line 30 for the Recovery rebate credit? Line 30 is only if you didn't get one or qualify for more.
Did you enter all the Stimulus payments you received? For both you and your spouse?
The first EIP1 was 1,200 (2,400 married) and 500 each dependent under 17. The second EIP2 was $600 for each person.
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. Did you get the 2nd round after you filed your return? 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.
How to put a trace on a missing 1st or 2nd Stimulus payment. IRS for Payment Issued but Lost, Stolen, Destroyed or Not Received
See question F3 here, you can expand it to see how to put a trace on it.
https://www.irs.gov/newsroom/2020-recovery-rebate-credit-topic-f-finding-the-first-and-second-econom...
