Taking courses is a great way to develop your skills and knowledge as a self-employed professional. 

You can expense any courses that are directly related to your business activity. 

Keep in mind that the financial authority (Finanzamt) may want to see additional information about the course to verify that it is directly related to your work. It is recommended to keep the details of the training program such as syllabus or other relevant material for a future tax audit.

Common types of training that you can expense include:

If you have recently moved to Germany, learning German could be really helpful to get started as a self employed business owner. German courses are fully tax deductible.

You can deduct up to 4000€ of training and education costs a year. 

Sorted tax guides are provided without liability and do not replace a tax advisor.
To get an accurate answer for your specific case, please consult a tax advisor.
You can always ask one of tax advisors on the Sorted platform.