Are you trying to import your sales transactions in QuickBooks Online (QBO)?
If so, QBO Advanced lets you import multiple invoices at once so you can save time. Let me show you how:
Go to Settings ⚙ and select Import Data.
Click Invoices.
Select Browse and then find and choose the spreadsheet of your invoices.
Continue by clicking Next. Then, map your import fields.
After you map the fields, review the summary of your import. If everything looks good, select Start import.
Once you're done, click OK.
If this is the time you import your sales transactions, you can download our sample guide. This will walk you through the process on how to set up your CSV file.
In case, you're using a different subscription, you can use a third-party app instead. Simply go to the Apps menu and search for an app. If you don't know what QuickBooks version you're using, click this link here to find out.