What year? 1800 sounds like the first and second Stimulus payments (1200+600). Did you have 1800 on 1040 line 30 for the Recovery Rebate Credit? The IRS took it off because they had already sent it to you. Line 30 is only if you didn't get the full amount or qualify for more.
EIP1 The first Stimulus payment was 1,200 for each spouse and 500 for each dependent under 17. Came out in spring of 2020.
EIP2 The second Stimulus was 600 per person and dependents under 17. The 2nd stimulus checks started going out at the very end of December 2020 and continued into January/Feb 2021.
The first 2 Stimulus payments went on your 2020 return even if you got the second one in Jan/Feb 2021.
Double check your bank statements and Check your IRS account (both accounts if married)
Your Online Account | Internal Revenue Service
