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In order to settle cryptocurrency transactions, it is necessary to first properly prepare documentation regarding the assets owned. Then, depending on the type of transaction, you should prepare for proper settlement: - If it comes to cryptocurrencies earned from mining, it is worth preparing a mining report and calculating the corresponding revenues. It is advisable to consult with an expert to determine the appropriate tax settlement method. - In the case of cryptocurrency trading, it is important to keep transaction documentation in order to determine profits and losses. Based on this information, the appropriate tax settlement can be made. - If you have received cryptocurrencies from a friend without a purchase receipt, it is worth preparing a gift agreement or other documentation confirming this transaction. It is important to remember that there are specific regulations regarding gifts that should be taken into account during settlement. As for accounting offices dealing with cryptocurrencies, it is worth looking for specialists in this field who have experience in the tax area related to cryptocurrencies. You can also consult with other cryptocurrency users to find out which accounting office they recommend.