If you have Microsoft excel installed on your computer then when you double click file it opens.
If file has only headings but no bought, sell date and quantity of virtual currency then the file is considered blank. It gives validation error when importing in turbo tax.
Seems like Coinbase provides all wallet files whether a user traded those currencies or not. If there are no trades, there are no transactions. Transaction history file for all assets also gives error. Turbo tax imports only individual wallet files. You import one file, click on select all, then on add more and go back and import next file until you have imported all files. Try practising.
