Assign the main employer
If, in addition to an existing one, you start another employment relationship, you have to decide which of these should be your first employment relationship in the future. The wage from the first employment relationship is taxed according to the family-friendly tax class (tax class I to V, possibly child allowances), all wages from further employment relationships according to tax class VI (here the income tax deduction is higher). The payroll tax deduction after tax class VI is usually assigned to the employment relationship from which you receive the lower wage.
Identification number Date of birth
no (only informal notification to employers)
Multiple employment relationships at the same time with multiple employers