1) IF...if the employer's state is a state with no income tax, you leave boxes 15,16,17 entirely empty.
2) If there are $$ in box 17, then there must be an employers ID in the second part of box 15 and you'd need to get that from your employer. Don't put a zero in box 17 if it's empty, leave it blank.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
