Should I add Box 11 exempt interest dividend from Nuveen for amount of over $1,800 when I do not know what states it came from; I live in Texas, a non income tax state?

Turbo Tax defaults to just answering boxes 1 -3 and those are -0-.  the only problem is I have tax exempt dividend interest on box 11 and do not know what states the interest was derived. I live in a non income tax state of Texas.