IF you had non-taxable combat pay, then it is on your W-2 form
Box 12 will have a code "Q" and a $$$ amount alongside it....also box 1 and box 16 of your W-2 will also be reduced by the value of that code Q $$ amount.
Other than that place, there is nowhere you make an entry for it ...........Other than testing EIC situations during the Federal interview...but even then you don't put in the value yourself, the software takes it form your W-2.
I know VA has a question about it in their interview, but as long as it's on your W-2 in the Federal section, you don't mess with it there or anywhere else.