Have I miss out any documents first time tax return mailing -. Quebec - montreal

[dream996]

I’m getting so confused with the process, have I missed out anything?
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I am in Quebec - Montréal.
2019 Feb - present.
First time filing out tax return and this is for T4 employment tax return.


I have filled : Income Tax and Benefit Return and keying summary for income tax return 2019.

I am sending both of these documents to CRA and Revenu Québec.

Have I missed out any documents?

Someone just mentioned to me about RL31 , is this one necessary? (Would I cause any issue if I don’t have it?)
Thank you very much!