Most states do not exempt interest earned on debt obligations issued by other states from taxation so there is probably no need for you to enter each amount separately at the level you mentioned.
New Jersey, however, may exempt interest earned on certain debt obligations issued by municipalities (or other political subdivisions) in that state. Although it's unlikely, you might want to check as to whether NJ is one of the states and then whether the particular debt obligation is exempt from NJ state tax.
