We've built a solution that allows you to import transactions from Coinbase to TurboTax, with plenty of help and resources along the way. ... csv files will include the cost basis of your Coinbase transactions (if available) so TurboTax Premier can easily help you file your cryptocurrency transactions.
see link(s) below-
How to file crypto taxes with TurboTax?
TurboTax Makes it Easier for Coinbase Customers to Report
