What this means

One GST registration is one legal GST identity for one state. A business operating from more than one registered state can save more than one registration.

GSTIN

The 15-character Goods and Services Tax Identification Number. Upstorr validates it before saving and can fill several official details from the result.

The registered legal name that appears on tax documents. This may be different from the name customers see on your storefront.

PAN Number

The business PAN connected to the GSTIN. It must match the PAN characters inside the GSTIN.

State

The Indian state where this GST registration belongs. Upstorr can suggest it from the first two digits of the GSTIN. If those digits do not identify a supported state, the field stays unselected. This suggestion is not GSTIN validation: wait for the full GSTIN check before saving.

Principal Place Address

The main registered business address for this GSTIN. City and Pincode complete that address.

Compliance Email and Compliance Phone

The contact details connected to tax compliance for this registration. Use details that the responsible person can access.

Authorized signature

The signature image printed on GST documents for this registration. It is required. Each time you save an uploaded signature, choose New documents only to keep existing documents as they are, or Existing and new documents to replace the signature on existing invoices, bills of supply, credit notes, and debit notes for this registration. Select Save in Apply new signature to confirm your choice, or Cancel to return without saving.

Updating existing signatures keeps amounts, dates, document numbers, and saved designs unchanged. The new signature appears when those documents are downloaded again. Files already downloaded or sent do not change. Custom documents use the current signature when generated; this choice controls already-issued invoices, bills of supply, credit notes, and debit notes.

Export zero-rating mode

  • None: no LUT or Bond is attached here.
  • LUT: the registration uses a Letter of Undertaking for eligible zero-rated exports.
  • Bond: the registration uses a Bond for eligible zero-rated exports.

When LUT or Bond is selected, its reference number and financial year are required. A financial year is written like 2026-27.

Default GST registration

The registration Upstorr can use as the store's default. Only one registration can be the default at a time. Inventory locations should still be connected to the registration for their own state.

Simple example

Your business is registered in Maharashtra and Karnataka. Save both GSTINs. Attach the Maharashtra registration to the Mumbai location and the Karnataka registration to the Bengaluru location. Documents can then use the identity belonging to the location fulfilling the order.

What you need to know

  • GSTIN validation helps catch mismatched details; it is not tax or legal advice.
  • A GST registration and an inventory location are separate records. Saving a GSTIN does not automatically attach every location to it.
  • Use LUT or Bond only when it applies to that registration. Ask your accountant when unsure.
  • Do not delete a registration that a current fulfilment location still needs.