You must enter the access code Revenu Québec assigned you for the current or preceding fiscal year.
The access code is a six-digit number assigned each year by Revenu Québec to any individual who filed a tax return. Individuals who file their returns with tax preparation software receive this number by mail. It is sent with the documentation accompanying the ETI 601 form, a few months before the annual tax return preparation period.
You are responsible for keeping your access code confidential.