The Tanzania Revenue Authority (TRA) requires individuals and businesses to obtain a Taxpayer Identification Number (TIN) for legal compliance, with registration forms available for download directly from the TRA website. While digital registration via the TRA Taxpayer Portal is encouraged,, specifically for individuals using NIDA and entities using ENTITY/KAMPUNI , manual applications can be initiated using forms found in the TRA Forms Library. Download the application for registration form at Tanzania Revenue Authority . TRA (Tanzania