Ephrem Posted April 30, 2023 Report Share Posted April 30, 2023 Error code 121 during submitting returun? Quote Link to comment Share on other sites More sharing options...
Curmudgeon Posted April 30, 2023 Report Share Posted April 30, 2023 At one time it meant there was a problem in the T4A(P) form. Usually box 16 was wrong. Don't know if it still means that. Quote Link to comment Share on other sites More sharing options...
Geo123 Posted April 30, 2023 Report Share Posted April 30, 2023 Hello Ephrem, Error 121 - Please carefully complete both identification fields and try again. Please be reminded that you must use your most recent information regardless of the tax year of the return you are attempting to transmit. Your access will be locked after five unsuccessful attempts Quote Link to comment Share on other sites More sharing options...
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