Begin by signing up at https://app.koinly.io. Once you have signed up you should:
1. Add all your exchange accounts, public addresses and wallets. It is recommended that you add ALL your trading history to ensure accurate reports.
2. Review your transactions. Once your wallets have been added Koinly will sync all your transactions and you will be able to view them on the transactions page. Koinly also tries to link transfers between your wallets.
3. Choose a tax plan. If you want to generate tax reports, you will need to purchase a tax plan at this point.
4. Download your tax reports.