A NetFile Québec error is typically caused by a mistake or omission in your return, or because you've indicated something in your return that doesn't match Revenu Québec's records.
In most cases, when you get a NetFile Québec error, the error message provides enough guidance on what's wrong so you can fix it and try submitting your return to NetFile Québec again.
If you need help understanding and/or resolving a NetFile Québec error, come visit us at AnswerXchange so we can help.