@elianhaan You cannot claim the Employee Retention Credit on your Form 1040 income tax return. You have to file a Form 944-X or 941-X Adjusted Employer's Federal Tax Return. I don't know if you can do that with TurboTax. How did you file the original 944 or 941 return?
See Employee Retention Credit on the IRS web site for more information. On that IRS page, scroll down to "How to Claim."
