INVENTORY

Hi @SAFAERZURUMLUGIL, 

You might want to use a third-party app to import your sales transactions. You can check the supported apps in the Apps tab at the left navigation panel.

There are two reasons why you can't successfully import your stocks. It could be:

• You have a duplicate item already in QBO.
• There is an invalid field in the Map

(You can correct the data on the Excel file and re-import the modified file.)

 For your reference, you can check this article: How to Import Products and Services from Excel.

If you have further questions, don't hesitate to comment below or post again.