Go to Channel Integrations
In Integration Page, Select Amazon and click on Edit
In manage your Amazon Inventory account integration page, click on Listing Templates
In Listing Template page, click on New Listing Template Button
In Listing Template page, enter the Amazon listing profile details and click on Save button to save all the details.
Go to General Details Page and enter all the details.
Once you are done with all the above, Click Save button. Now you have successfully created Amazon Listing Template and it will save in Template location.
When you are listing the products, you can select this Template and associate this Template to the products.