Whether you have stock, bonds, ETFs, cryptocurrency, rental property income or other investments, TurboTax Premier has you covered. Filers can easily import up to 10,000 stock transactions from hundreds of Financial Institutions and up to 4,000 crypto transactions from the top crypto exchanges. Increase your tax knowledge and understanding all while doing your taxes.
this comes from this thread all the way at the bottom. so this may be the issue
you can contact support to verify this
if you can't import then you'll need to manually enter summary totals in Tutbitax so you can e-file. however, the IRS requires documentation of the trades so you'll need to print out the CSV file and send it along with form 8453 to the iRS. carefully follow the form instructions