WASHINGTON (AP) — First, there were trackers on Taylor Swift and other celebrities' private jet usage. Now, there will be more scrutiny on executives' personal use of business aircraft who write it off as a tax expense. IRS leadership said Wednesday that the agency will start conducting dozens of audits on businesses' private jets and how they are used personally by executives and written off as a tax deduction — as part of the agency's ongoing mission of going after high-wealth tax cheats who game the tax system at the expense of American taxpayers.