I get this error: The authentication data entered do not correspond to the data in our files. (T3BAAS05) I I don't see any problems, checked everything, what should I do?

Please make sure that your last name, first name, date of birth, and SIN (Social Insurance Number) that you entered in your return matches what Revenu Québec has on file for you. You may want to contact Revenu Québec to double check what information they have for you.