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The Classic Partners LLP · GST Services

E-Invoicing Software

Selection, integration and day-to-day running of electronic invoicing systems that report your invoices to an Invoice Registration Portal and bring back a signed Invoice Reference Number.

Quick answer

Electronic invoicing under the Goods and Services Tax does not mean raising invoices on a government website. It means reporting invoices already generated in your own billing or accounting system to an Invoice Registration Portal (IRP), which validates them and returns a digitally signed invoice carrying an Invoice Reference Number (IRN) and a Quick Response (QR) code. Once reported, the data flows automatically into GSTR-1 and into the e-way bill system.

What we cover

What our e-invoicing service covers

From working out whether it applies to you, through to a stable go-live.

  • Checking applicability against the notified aggregate annual turnover threshold
  • Selecting an e-invoicing solution suited to your invoice volume and existing software
  • Integrating your Enterprise Resource Planning (ERP) or accounting system with an Invoice Registration Portal
  • Configuring the invoice schema, Harmonised System of Nomenclature (HSN) codes and mandatory particulars
  • Managing cancellation of Invoice Reference Numbers within the permitted window
  • Reconciling reported e-invoices against GSTR-1 auto-population and correcting mismatches
Key components

What an e-invoicing setup has to get right

The moving parts that decide whether reporting runs quietly in the background.

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Invoice Reference Number

The unique number returned by the Invoice Registration Portal. For a covered taxpayer, an invoice without a valid Invoice Reference Number is not a valid tax invoice.

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Signed QR Code

The signed Quick Response code returned by the portal must be printed on the invoice so that it can be verified independently.

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System Integration

Reporting can run through a direct application programming interface, a GST Suvidha Provider, or an offline utility, depending on volume and internal capability.

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Auto-Population

Reported data flows into GSTR-1 and into Part A of the e-way bill, removing duplicate data entry and a common source of mismatch.

How we work

Our process

From initial consultation to completion.

1

Applicability Assessment

Establishing whether e-invoicing applies to your entity, from which date, and for which categories of supply.

2

Solution Selection

Comparing options against invoice volume, existing systems, internal skills and cost of ownership.

3

Integration and Testing

Mapping master data, configuring the schema and testing in the sandbox before any live invoice is reported.

4

Go-Live and Support

Running the first cycles alongside your team and resolving rejections, cancellations and reconciliation differences.

Why choose us

Why e-invoicing projects come apart after go-live

What sets our approach apart.

Master data is rarely clean enough

Incorrect Goods and Services Tax Identification Numbers, state codes, pin codes and HSN masters cause portal rejections in bulk on the very first day of live reporting.

Reporting time limits are unforgiving

Where a time limit for reporting applies to your turnover class, an invoice not reported inside that window cannot be reported later at all.

Auto-populated returns still need review

The GSTR-1 draft is only as complete as the reporting behind it, so invoices that failed at the portal quietly go missing from the return.

FAQs

E-invoicing questions answered

What people ask before engaging us.

No. It applies where aggregate turnover in any specified financial year has crossed the notified threshold, and certain classes such as banking companies, insurers, goods transport agencies and passenger transport operators are excluded.
The Invoice Reference Number itself cannot be edited. Within the permitted window the invoice can be cancelled and reported afresh; after that, correction is made through amendment in GSTR-1 or through a credit or debit note.
Yes. Movement of goods still requires an e-way bill, although Part A can be generated together with the Invoice Reference Number from the same reported data.
Reporting can be routed through an alternate portal, and where reporting is genuinely prevented, the invoice is reported once service is restored within the applicable time limit.

Crossed the e-invoicing threshold?

We will assess applicability, pick the right solution and run the integration to a clean go-live.

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