As an easier workaround, You could always take out those box 8 & 13 $$, just for the state(s) involved....and report them on a separate 1099-INT. i.e, you home state on one form, and all the other states on a separate 1099-INT...with box 13 reported on whichever of the two it's needed.
I Commonly do this anyhow for Muni bonds I purchase during the year, where I pay accrued interest to the seller, since a 1099-INT with box 1, 3 & 8 $$ on it, the accrued interest deduction will be applied wrongly if you don't move box 8 & 13 into its own 1099-INT form.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
