Step 1: Apply for the ticket type (go to the branch office) 1. Official seal and special seal for invoice 2. Copy of tax registration certificate or three-in-one certificate 3. Application form for online (electronic) invoice business 4. Taxpayer's invoice type verification form 5. Taxpayer's ticket type verification circulation form (for internal use) (Note: according to the requirements of the branch office) (Note: 3.4.5 items are according to the requirements of the branch office)