You’re getting that error message because the CSV produced by Coinbase contains headers that are not formatted correctly to be recognized by the Turbotax system. This is what this thread has been discussing (read previous content). Every now and again you’ll get a response from an “Expert” but I think it’s just a bot, or someone not paying any attention to the problem. Only getting thoughtless/worthless advice. A paid service such as CoinTracker will link with your Coinbase account and produce the correct CSV that will upload to Turbotax. Depending on the amount of transactions you’ve made last year, the cost for this 3rd party service is anywhere from free to $200.
