https://bear.tax/That is a neat service.
- imports your trades from 50+ exchanges
- processes them and removes any unwanted taxable events like withdrawals from exchange to wallet or transfer between exchanges.
- allows you to review unaccounted deposits to get the right purchase price
- does FIFO matching with your trades across exchanges and provide your auto-generated documents
- exports directly to TurboTax, TurboTax Online and TaxAct.
- finally provides a detailed CSV to submit in situations when you receive such notices. This CSV is the one required by your accountant if you are filing your taxes via them.