Since you have registered a small business, you should know about the most important regulations:
Trade tax: As a small business owner you have an annual tax allowance of 24.500€ according to § 11 Abs. 1 Satz 3 Nr. 1 GewStG. This means that you do not have to pay trade tax.
Sales tax: The tax-free turnover limit is 22.000€ according to § 19 UstG. This means that you are spared the sales tax hassle.
Income tax: As a small business owner you also have to pay income tax. The income tax is applied to your earnings. Furthermore, the basic tax-free amount of 9,744€ according to § 32a EstG still applies.
Good to know: You will receive an invoice after each cleaning, which you can submit to the tax office when filing your tax return. You can find all your invoices on your profile. ✌️