Before anything else, may I know if you're using QuickBooks Desktop? If so, once you receive an Accountant's Copy (.QBX) from your accountant, you can convert it working file (.QBA). Here's how to do that:
Click the File menu, then select Open and Restore Company.
Select Convert an Accountant’s Copy Transfer File.
Hit Next until you see the Open Accountant's Copy Transfer File window.
But if it is the export to online from desktop file you have upload to qbo from a computer with quickbooks desktop installed. So you may have the wrong file from the cpa or they should do the upload for you.