I put my mileage in for my contract work and this has always changed my return but this year it did nothing. Have the laws changed?

[pdilly]

Yes!  Sadly, Congress passed a law in December 2017 to stop letting people deduct unreimbursed job expenses for federal taxes beginning in 2018!  Big time bummer! But you can still enter them while you're completing your federal tax return so they transfer over to your state return -- in case your state still allows that deduction.