A special rule enables many employers to retroactively reduce the amount of their nondeductible parking expenses. These employers have until March 31, 2019, to change their parking arrangements to reduce or eliminate the number of parking spots they reserve for employees. 

Making this change may let churches, schools, hospitals and other tax-exempt organizations to reduce their associated UBTI. In some cases, organizations may avoid having to file a Form 990-T, Exempt Organization Business Income Tax Return. Changes made concerning this issue will apply retroactively to Jan. 1, 2018.