What documentos should I send with my tax return (federal and Quebec), when i could not send it electronically and I have to send it by postal mail?

[emigdiolg-gmail-]

I filled my tax return with TurboTax but when I tried to log in into my CRA and RQ accounts there was an error and now I have the pdf and I have to send it by mail.

[TurboTaxSusan]

What was the exact error message that you got when could not file your return? 

When you file your Quebec return by mail, you don't need to send anything except for the return. Keep your slips and other documentation for your records.

This CRA link tells you what is needed when you file your Federal return by mail: https://www.canada.ca/en/revenue-agency/services/tax/individuals/segments/students/what-you-include-...