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An error occurs on T1 returns when there's an amount on line 22200 and no amount on line 31000, and the taxpayer has over $68,500 in pensionable earnings.
CRA EFILE errorClaiming an exemption in Part 6 and answering Yes to the question at line line 605 triggers error 1720.
known issue SERs EFILE error UHTTo resolve this error, answer Yes to the first-time filer question on the Info worksheet for any T1 return sent to the CRA for the very first time.
EFILE errorFirst-time filer's name and the BC renter's tax credit.
EFILE error T1