Taxes on crypto trading are regulated differently in every country.
Your investments in crypto currencies can generate income or capital losses. In the case of your investments with Trade Republic, we advise you to check with a tax advisor what are the tax obligations in your country.
Trade Republic will make available in your App an annual statement listing all of your trading activities including those involving crypto-currencies, which you can use to complete your tax return.
You will find it in your Profile > Tax Information.