I don't see a return address in the left corner of the voucher.  The client address (return address) and the IRS address sit pretty much side by side on the vouchers I print out.

I DO see that the spouses last name doesn't appear in the 2018 voucher if you didn't enter it in the info worksheet (since that's for only when its different than the TP)

Yes IMA got married in 2018  LOL  saved a ton of taxes too!