WASHINGTON — The Internal Revenue Service today issued guidance for taxpayers with certain deductible expenses to reflect changes resulting from the Tax Cuts and Jobs Act (TCJA). Revenue Procedure 2019-46, posted today on IRS.gov, updates the rules for using the optional standard mileage rates in computing the deductible costs of operating an automobile for business, charitable, medical or moving expense purposes. The guidance also provides rules to substantiate the amount […]