You should edit the 1099-INT, or 1099-DIV forms that have any tax-exempt $$ recorded....using the interview step-thru.
On the follow-up page that asks what single state the $$ came from (first bullet selection), just scroll to the bottom of the list of states, and there is a selection for "Multiple States".
____________________
For box 14 on any 1099-INT....leave that box empty. You only enter something there if it was for a single bond
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*