Enter the Client, then look at the Profile. Remove the check marks for SELECT FOR E-FILE. 

Then go to e-file PDF/Miscellaneous > Form 8948 ... > and check the first box for Taxpayer(s) chose to file return on paper.

Advise the client that the return is reviewed more thoroughly and will take much longer to process. Also let them know that stuff gets lost in the mail. e-file is much quicker and more secure and you get immediate confirmation of receipt of delivery. PAPER IS A PAIN. Where do you even find an envelope nowadays?