What is Form GST INV-01 e-invoice JSON schema?

Form GST INV-01 is the official 132-attribute technical JSON schema established by the GSTN for generating IRNs across all IRP portals in India.

What is the new mandatory requirement for Ship-To details in the e-invoice JSON schema?

Under the 2026 advisory, `ShipDtls.Gstin` is conditionally mandatory for Bill-To/Ship-To transactions. If the consignee is an unregistered entity, 'URP' must be specified.

How many line items are permitted in a single e-invoice JSON payload?

A single e-invoice JSON payload supports up to 1,000 line items under the `ItemList` array (extendable to 5,000 upon request to NIC).

How does TrulyInvoice AI automate invoice entry into Tally Prime?

TrulyInvoice AI parses supplier PDFs, auto-extracts line items, HSN codes, and tax totals, posting verified F9 Purchase Vouchers directly into Tally Prime via Port 9000 local sync in 15 seconds.

E-Invoice JSON Schema Validation & Technical Rules (2026 Guide)

Quick Summary: What Is the GST E-Invoice JSON Schema (INV-01)?

The E-Invoice JSON Schema (Form GST INV-01) is a standard payload containing 132 attributes organized into 12 sections. It mandates fields like Supplier/Buyer GSTIN, Document Type/No, ItemList (HSN, Qty, Price, Tax Rate), and ValDtls (Taxable Value, Tax Breakdown). Any format error results in IRP rejection.

132 Technical Attributes: Grouped across 12 distinct JSON objects.
Mandatory ItemList: Line item array supporting up to 1,000 items per invoice.
ShipDtls Requirement: ShipDtls.Gstin is mandatory for Bill-To/Ship-To ('URP' if unregistered).
ValDtls Schema: Strict mathematical validation between ItemList sums and ValDtls.

1. GST E-Invoice JSON Schema Section Structure

The 132 attributes of Form GST INV-01 are partitioned into 12 core objects:

JSON Object Name	Classification	Key Attributes & Validation Rules
1. TranDtls	Mandatory	TaxSch (GST), SupTyp (B2B, SEZWP, EXPWP), IgstOnIntra
2. DocDtls	Mandatory	Typ (INV, CRN, DBN), No (max 16 chars), Dt (DD/MM/YYYY)
3. SellerDtls / BuyerDtls	Mandatory	Gstin (15 chars), LglNm, Pos, Pin (6 digits), Stcd
4. ItemList	Mandatory (Array)	HsnCd (6-digit), Qty, Unit, UnitPrice, AssAmt, GstRt, IgstAmt
5. ValDtls	Mandatory	AssVal, CGSTVal, SGSTVal, IGSTVal, TotInvVal (Math Sum)

Automate Purchase Bill Verification for Tally Prime

Ensure incoming supplier bills match purchase vouchers 100%.

Data entry mistakes in purchase vouchers (typing errors in invoice numbers or date formats) prevent Tally Prime from auto-matching downloaded GSTR-2B entries.

TrulyInvoice AI Solution: Upload supplier PDF bills or WhatsApp scans. AI auto-extracts line items and posts F9 Purchase Vouchers directly to Tally Prime in 15 seconds via Port 9000 local sync.

E-Invoice JSON Schema Validation & Technical Rules (2026 Guide)

Quick Summary: What Is the GST E-Invoice JSON Schema (INV-01)?

1. GST E-Invoice JSON Schema Section Structure

Automate Purchase Bill Verification for Tally Prime

Stop Manual Voucher Entry.