Audit of Tax Payments Made on TVA Credit Cards

We audited the Tennessee Valley Authority's (TVA) corporate card transactions from October 1, 2013, through June 30, 2016, totaling $45.2 million to determine the effectiveness of the processes TVA has in place for tax-exempt credit card transactions. We found the processes TVA has in place for tax-exempt corporate card transactions are not effective. Specifically, we identified (1) an estimated $2.48 million of taxes TVA paid on tax-exempt transactions; (2) tax information provided by TVA's credit card supplier, Comdata Network, Inc., was inaccurate; and (3) transactions were approved in TVA's Expense Reimbursement System without adequate support.