The Florida Department of Revenue has released a free mobile app that allows taxpayers to document tax-exempt sales. The app can verify Florida sales tax certificate numbers or Consumer’s Certificate of Exemption numbers and provide a transaction authorization number for valid certificate numbers. The app can be used on the iPhone and iPad, Android phones and tablets, and the Windows Phone. The free FL Tax mobile app can be downloaded from the app store on mobile devices. Taxpayers must enter their 13-digit sales tax certificate number in the seller field and their customer’s Florida sales tax or tax exemption certificate number in the buyer field when downloading the app. If the certificate is valid, a confirmation number will be provided that can be used to support the tax exempt sale. (Tax Information Publication, No. 14A01-08, Florida Department of Revenue, September 26, 2014)