This Aug. 19, 2015, file photo, shows the Internal Revenue Service Building in Washington. The tax overhaul bill has yet to be passed at this point. But if it does, those changes will take effect in 2018.
This Aug. 19, 2015, file photo, shows the Internal Revenue Service Building in Washington. The tax overhaul bill has yet to be passed at this point. But if it does, those changes will take effect in 2018. Andrew Harnik AP
This Aug. 19, 2015, file photo, shows the Internal Revenue Service Building in Washington. The tax overhaul bill has yet to be passed at this point. But if it does, those changes will take effect in 2018. Andrew Harnik AP