1099-Div box 8 for US only divideds

I have a US brokerage 1099 with US and multiple international dividends. In the Turbo Tax desk top version I created a 1099 form for each international country and one for US dividends. In running smart check it says I need to enter a response other than ""not applicable" in box 8 for the US only dividends.. Cannot figure out how to fix?