While it may be possible for certain multi jurisdictional tax documents to cover exemptions in multiple states, no single document will cover all exemptions in all U.S. states. Attempts to do so including generating own custom forms to handle scenarios can lead to significant compliance issues. Tax laws vary by state and some states may require a certain certificate form while others might not. Before you accept a resale or exemption certificate from your client, contact your state to determine what exactly is required so that you can sell your items tax-free. Once you are familiar with the rules, you can setup your validation rules in EXEMPTAX, and apply these rules towards future purchases from respective clients.