I am relatively new to both investing and doing your taxes in Germany. I have read many articles, none of which were official documents because I couldn't find them (also I don't know German). But I still do not understand how to do my taxes and how much need pay.
How much tax do I have to pay for capital gains? Could you explain the calculations in a clear example?
For example, let say I bought an ETF which is paying dividends quarterly, and it doubled its price by the end of the fiscal year (say the price was 100Euros, and it paid 10Euros dividend).
Also, how can I verify that the tax I paid was correct? For example, if I pay fewer taxes than what I would need to, what happens?