From the Federal section of your return, select the Wages & Income tab in the top menu to get to Your income summary screen. In the top part, you'll see Cryptocurrency listed. Select Edit/Add or scroll down to the Investment Income section, and select Revisit next to Cryptocurrency. Your Cryptocurrency summary will open on the next screen, select Edit. On the next screen, select the trashcan on the right side of the transactions you want to delete.
Once you delete, you can reimport your transactions by going through the same steps and adding your new import.
