Log in to Merchant's Portal > Menu > Items > Tax
You can bulk edit items' sales tax according to the following procedures:
Log in to your Merchant Portal
Click "Menu" followed by "Items"
Click on the first checkbox to mark and select all the items on the page
Click on the Pen icon beside "Tax"
Input your correct Tax Rate into the column provided and click "OK" to save and publish your changes
If you need further assistance, please feel free to submit your request to Customer Care Team through our Help Center and we will contact you as soon as possible.