Form TC-40A: Nonrefundable credit amt: Nonapportionable Nonref Cr-1 Must be greater than zero.

I don't know what number this is going for, i looked at the form and i don't think it applies but it says it has to be greater than 0 so a put 1 then it told me it should be 0 so i switched back and it just won't let me proceed.