How to add another state GSTIN in one account?

Hi foodmaniaonline,

Adding another GSTIN number in QBO is not available. What you can do is to sign up for another QBO company for the other tax ID.

On the other hand, you can check out the Resource Center to see more references for QBO. You can also check about setting up QuickBooks for GST.

Let me know if you have other questions regarding taxes in QBO.