Taxclasses in Germany, referred to as "Steuerklassen", determine your income tax rate based on your marital status, your spouse's income and the number of dependent children. The amount of unemployment benefits, social security and holiday pay depend on the tax class you have been placed in.
If you want to check your partner's current status, you can use this German simulator. Here you need to enter your gross salary together with your postcode. You will be able to see if it is worth making a tax class change in Germany.
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