You sure that TTax didn't make this decision for you. It depends on the math! At the bottom of the 1040 there is either tax owed or zero or a refund amount.
On the bottom of the 1040 you could enter the bank name, bank number, and your account number. This only prints or gets e filed if you are to get a refund. If not a refund, these fields are filled with all X.
Check past years when you might have though you send in your bank ID information but did not.
