You are correct a military retirement 1099-R will not have an entry in box 11, which is for Roth distributions. Typically, TurboTax will ask for a box 11 entry if an entry has been inadvertently made (stray space or zero for example) in box 5 and/or 10. Edit your 1099-R entries and clear out boxes 5 and 10 (backspace/delete as needed). The boxes need to be blank (no entry) not even zero.
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