This is likely a combo of inputs. Here's what I would look at and play with:

Screen 1: Is e-file selected? If it is, a government copy technically isn't needed. To get a complete government copy instead of just the e-file forms:

Settings>Options>Items to Print>Govt Copy>Only efile Forms in Complete Return">No

Screen 3: "Miscellaneous">Form 1040-V>input "1"

Settings>Options>Tax Return>Federal Tax Options>Form 1040-V>"When Applicable"

FWIW, I only have one client that insists on vouchers anymore (because I hit my clients hard with how I trust the post office WAY less than the security of online banking). So for her, I just do a "partial print" and manually select the client letter and all the balance due and estimate vouchers.