Whay do i do? My 1099int is blank in box 15, had a 1 in box 16 and 17 is blank. It stops my processing and says 17 needs a number in it since 16 has a number?

It is unusual to have state taxes withheld from Form 1099-INT.  If there were taxes withheld for a state, then all three boxes 15, 16, and 17 would need information in them.  

Since box 16 (state ID number) is the only one with any information provided, it is most likely an error.  You should contact the financial institution that issued the Form 1099-INT to confirm that no state taxes were withheld.  Then, if you learn that there were not any state tax withholdings, delete the '1' that was reported in box 16.  That information is not needed if state tax was not withheld.