Do we need to mail the documents separately? I filled the tax forms for my wife in the same account.

[TurboTaxLise]

No, you need not worry about mailing anything in, but keep all documentation and expenses claimed in case the CRA asks for it later. 

Please refer to link below if needed to ensure you have Netfiled your tax return to the CRA (if needed)

How do I know if my return was filed using NETFILE and received by the CRA?https://turbotax.community.intuit.ca/replies/2864697