That may be true, but the tax withholding on the W-2 is only an estimate of what you "might" owe at tax time.
IF you end up owing with not refund at all, you can submit a new W-4 form to either your other employers, or the NG, to get withholding increased (claim fewer "allowances" on the W-4 form ) so you don't end up the same way next year.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
