The Internal Revenue Service released on Thursday the 2018 optional standard mileage rates that taxpayers and tax professionals can use to calculate the deductible costs of operating an automobile for business, charitable, medical or moving purposes.       Home  |  Subscribe       Daily Edition   Dec 15, 2017       Top Stories   IRS increases standard mileage rates for 2018 by MICHAEL COHN   The Internal Revenue Service released on Thursday the 2018 optional standard mileage rates that taxpayers and tax professionals can use to calculate the deductible costs of operating an automobile for business, charitable, medical or moving purposes. READ MORE »   Tax debate update: Mystery, suspense mount as final plan is due by SAHIL KAPUR   Congressional Republicans are scheduled to reveal final details of their agreed-upon tax-overhaul legislation Friday. It