| Tax Year | Number | Yes | The year for which taxes are filed |
| Applicant Name | Text | Yes | Name of the individual/company |
| Address | Text | Yes | Current residential or business address |
| Date of Birth | Date | Yes | Date of birth of applicant |
| Tax Identification Number | Text | Yes | National tax ID or Steuernummer |
| Marital Status | Text | Yes | Marital status (single, married, etc.) |
| Bank Account Details | Text | Yes | IBAN/BIC for refunds or payments |
| Children Information | Text | No | Names and birthdays of children |
| Health Insurance Details | Text | Yes | Provider and policy number |
| Supporting Documents | File | No | Additional supporting documents |
| Contact Email | Text | Yes | Email for correspondence |