The taxation of crypto-assets is managed differently in each country. Cryptocurrency is still a new technology, and governments are assessing how to classify crypto-assets. We highly recommend you contact a licensed accountant or service provider that is qualified to advise you on cryptocurrency taxes in your specific country/region.
If you are looking to include crypto-asset transactions and holdings when filing taxes, then you would need to export the history of your wallet to a CSV. From there, you can submit the relevant transactions to your accountant.