IRS issued final guidance on PPP:

• Rev. Rul. 2020-27 / May a taxpayer that received a loan guaranteed under the Paycheck Protection Program (PPP) authorized under section 7(a)(36) of the Small Business Act (15 U.S.C. 636(a)(36)) (covered loan), and paid or incurred certain otherwise deductible expenses listed in section 1106(b) of the Coronavirus Aid, Relief, and Economic Security Act (CARES Act)...
   
• Rev. Proc 2020-51 / This revenue procedure provides a safe harbor allowing a taxpayer to claim a deduction in the taxpayer’s taxable year beginning or ending in 2020 (2020 taxable year) for certain otherwise deductible eligible expenses, as defined in section 2.03 of this revenue procedure...