Starting at a GST Taxpayer’s page, you’ll find a link to the Customers and Suppliers master data. To add more, click on the XLS Upload button.
The XLS file should have fields about each company such as Name, City, State, Phone, and Email. Most importantly, you can also provide the GSTIN and PAN number of the entity.
GSTZen also provides a sample file that you can download, paste your data into it, and upload back.
To upload, choose your file and click the Upload button. GSTZen will then process the file and report the status. To complete the upload, click the confirm button. You will be able to see these new entries in your Customers and Suppliers Master Data list.