Do I need to include my RL forms when filing by mail my Turbotax printed copy to Revenu Quebec?

No, you do not need to submit RL slips along with your printed return. You will need to keep them in case Revenu Québec asks for them.

For more information: https://www.revenuquebec.ca/en/citizens/income-tax-return/filing-your-income-tax-return/what-to-do-w...