Cryptoasset transactions may create Irish tax obligations, depending on what you did and your circumstances. Selling or exchanging crypto can generally be relevant for Capital Gains Tax, while activities such as trading as a business, mining or receiving staking rewards may be treated differently. Keep detailed records of dates, values, costs, fees and transactions, and check whether a tax return or payment is required. Revenue’s guidance on crypto-assets is the key reference; consider speaking to a qualified tax adviser if your situation is complex.