If a supplier has multiple GSTNs, do we have to create new supplier for each GSTN?

Hi Shravan,

Welcome to QuickBooks Community.

Currently, QuickBooks is designed to support one GSTIN per company. If you have multiple GSTIN, please create multiple companies to manage them end-to-end.

Here's everything you need to know about GST in QuickBooks. 

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I hope this helps.