SaaS: Automated Tax Workflows

B2B SaaS platforms charging Indian customers issue GST-compliant invoices, generate IRN for B2B sales above the threshold, and file GSTR-1 from billing data — without a parallel accounting workflow. WhiteBooks plugs into Stripe / Razorpay / Paddle webhooks or your custom billing system.

Patterns

Pattern A — Billing-event-driven IRN

On each successful charge webhook from Stripe / Razorpay / Paddle, fire an IRN request to WhiteBooks. Store the IRN + signed QR on the invoice record. Email the customer with the QR-embedded PDF.

Pattern B — Scheduled GSTR-1 push

At month-end, push the month's invoice data to WhiteBooks GSTR-1 endpoint. WhiteBooks validates, queues, and files via the GSP channel. Receive a webhook on filing success.

Pattern C — TCS deduction (marketplaces)

If you operate a marketplace (multi-seller SaaS), deduct TCS under section 52 from seller payouts and file GSTR-8. WhiteBooks generates the TCS challan and exposes a per-seller TCS statement.

Invoice format requirements

FAQs

Who uses WhiteBooks for SaaS workflows?

B2B SaaS platforms charging Indian customers need GST-compliant invoicing baked into their billing system — not bolted on through manual export to accounting. WhiteBooks handles this via OAuth 2.0 REST APIs, first-party SDKs in Java / Node / Python, and pre-built connectors for SAP / Oracle / Dynamics / Tally.

How long does integration take?

Typical timelines: 1–2 sprints for SaaS / fintech integrations on the raw REST API; 3–5 weeks for Tally-connector deployments; 4–8 weeks for SAP / Oracle full integrations.

Sandbox?

Yes — apisandbox.whitebooks.in/{product} mirrors the production schema with a sample GSTIN. Free.

Does it support KSA ZATCA?

Yes — WhiteBooks ships a dedicated KSA e-Invoice API for businesses with Saudi Arabia operations. See /api/ksa-e-invoice-api-for-developers.

Pricing?

Annual plans from Custom pricing (Starter, 1,000 IRN/month) → Custom enterprise pricing/year (Enterprise, unlimited). Free sandbox. See /about/pricing.

Part of the WhiteBooks SaaS use-case cluster. Last updated 27 May 2026.