Hi imran
You can download the ATUM Products + data template:
Our create your own one. You can use this spreadsheet to create your product and then import it to your site.
Regarding the category, you have to fill the product_category column.
I leave you here the documentation of the add-on in case you haven't seen it: https://forum.stockmanagementlabs.com/t/atum-export-pro-documentation
Hope this helps,
Best Regards,
Andrea.