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⚡ The 20th arrives every month. Your clients still haven't sent their July invoices. This workflow fixes that permanently.
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⚡ For Individual CAs & Small CA Firms · 2-Hour Setup · ₹0 to Start

Stop Chasing Clients
on WhatsApp at 11pm.

Every CA in India knows this feeling: it is the 18th, GSTR-3B is due on the 20th, and 12 clients still haven't sent their purchase invoices. This workflow automates the entire document collection, GST reconciliation and filing prep — so you are never the one chasing.

80%
Less Manual Follow-up
₹0
To Start Today
2 hrs
Full Setup Time
See the 5-Step Workflow → All Tools Used
GSTR-1 · GSTR-3B WhatsApp Automation Zoho Books · Tally No Code Required
20th
Every single month
GSTR-3B is due on the 20th. TDS on the 7th. ITR season in July. A CA's life is a calendar of deadlines where every miss costs their client money — and costs the CA their reputation.
40+
Clients per CA on average
Individual CAs manage 40–80 clients simultaneously. Manually following up with each one before every deadline is 60–90 minutes of WhatsApp work per month that AI can do in seconds.
3 hrs
Saved per client per month
Document collection, entry, reconciliation, filing prep — most CAs spend 2–4 hours per client per month on work that is almost entirely automatable. At 50 clients, that's 150+ hours.

The 20th used to mean
panic. Now it doesn't.

Most CAs run their practice the same way they did 10 years ago — WhatsApp groups, email follow-ups, manual Tally entry, and a spreadsheet that only they understand. The CAs growing their practice in 2026 are the ones who automated the repetitive parts and spent their time on advice, not data entry.

This workflow does not replace your judgement. It replaces the 3am reminder messages and the manual GSTIN lookups.

❌ Without Automation
✓ With This Workflow
📷 Chase clients manually before every deadline
⚡ Automated WhatsApp reminders fire 7 days before
📋 Sort and rename invoice photos by hand
🤖 AI extracts data from any invoice format automatically
📈 Manual GST reconciliation for every client
✅ GSTR-2B vs purchase register matched in minutes
🕑 3 hours data entry per client per month
📈 Auto-pushed to Zoho Books or Tally export
🔒 Knowledge locked in your head
📄 Every client has a structured digital file

The 5-Step CA Workflow

Total setup: 2 hours
1
Step One · 20 min
Set Up Automated Client Document Reminders
Create a Google Sheet with every client name, their WhatsApp number, and filing due dates. Connect it to Make.com. Set a scheduled scenario to run on the 12th and 17th of every month — it reads the sheet and sends each client a personalised WhatsApp message via AiSensy: “Hi [Name], your GSTR-3B is due on the 20th. Please share this month's purchase invoices here.” You set it up once. It runs every month without you touching it.
Try Make.com → Try AiSensy → Open Google Sheets →
Make.comAiSensyGoogle SheetsWhatsApp API
2
Step Two · 25 min
Auto-Extract Data From Any Invoice — Photo, PDF or WhatsApp Forward
Clients send invoices however they want — a photo taken on a phone, a WhatsApp forward, a scanned PDF, sometimes a photo of a handwritten bill. Nanonets (used by HDFC and ICICI) handles all of these. Its pre-built GST invoice model extracts: supplier GSTIN, buyer GSTIN, invoice number, date, HSN/SAC codes, CGST, SGST, IGST and total — with 97%+ accuracy on printed invoices. For invoices in Hindi or Gujarati, route through Sarvam AI Translate API first. All extracted data writes automatically to your master Google Sheet.
Try Nanonets → Try Sarvam AI → Try Docsumo →
NanonetsSarvam AIDocsumoOCR
3
Step Three · 30 min
Auto-Validate GSTINs and Reconcile GSTR-2B vs Purchase Register
Make.com runs instant validation checks on every invoice: GSTIN format (15 chars), active status via the free GST Portal API, correct CGST+SGST for intra-state vs IGST for inter-state. Mismatches go to a “Review Required” tab. Then it compares your extracted purchase data against the GSTR-2B auto-populated by the GST portal. Matched invoices are confirmed. Unmatched ones — typically 10–15% — are flagged for your review. You only touch the exceptions, not the entire register.
Try Make.com → Open Sheets →
Make.comGST Portal APIGSTR-2BValidation
4
Step Four · 20 min
Push Clean Data to Zoho Books or Export to Tally
Validated invoices auto-push to Zoho Books — India's most popular GST-compliant accounting platform, free for up to 1,000 invoices per year. Make.com has a native Zoho Books connector — zero manual import. If your clients run Tally, Make.com exports a Tally-importable XML file instead. Every entry is time-stamped, client-tagged and traceable. Your books are always current. Your CA's most dangerous habit — the end-of-year data scramble — stops here.
Try Zoho Books → Try Make.com →
Zoho BooksTally PrimeMake.comAuto Entry
5
Step Five · Monthly
Auto-Generate GSTR-1 and GSTR-3B Summary Reports
On the 18th of every month, a scheduled Make.com run groups all verified invoices by GSTIN and HSN code, calculates GSTR-1 (outward supplies) and GSTR-3B summary totals, and exports a GST-portal-ready Excel file per client. You or your client uploads it directly. Estimated time saved: 6–10 hours of reconciliation per client per month. At 50 clients, that is 300–500 hours returned to you annually — time you can spend on advisory, on growing your practice, or on not working at midnight.
Try Make.com → Open Sheets →
Make.comGSTR-1GSTR-3BMonthly Schedule

Every Tool You Need

All have free tiers · Total cost to start: ₹0
Make.comFree Tier
⚙️ Automation · Workflow Engine

The glue connecting everything: client reminders, invoice intake, GST validation, Zoho Books push, and monthly report generation. All visual, no code. Free tier: 1,000 ops/month — enough for 30–50 clients starting out.

Used in: Steps 1, 3, 4 & 5
Free · then $9/moTry Free →
AiSensyFree Tier
📱 WhatsApp · Client Reminders

India's top WhatsApp Business Platform. Send templated document collection reminders to every client, personalised by name and deadline. Free tier: 1,000 conversations/month. No upfront cost. Replies land in a shared team inbox.

Used in: Step 1 — Client reminders
Free to startTry Free →
NanonetsFree Trial
🤖 AI OCR · Invoice Extraction

AI OCR trained specifically on Indian invoices. Pre-built GST invoice model extracts all required fields — GSTIN, HSN, tax breakdowns — out of the box. 97%+ accuracy on printed invoices. Used by HDFC and ICICI for document processing.

Used in: Step 2 — Invoice data extraction
Free trial · per pageTry Free →
Zoho BooksFreemium
📓 Accounting · GST-Compliant

India's most popular GST-compliant accounting platform. Free for up to 1,000 invoices per year. Natively generates GSTR-1, GSTR-3B and reconciliation reports. Make.com connects directly — zero manual import required.

Used in: Step 4 — Accounting destination
Free up to 1,000 invoices/yrTry Free →
Sarvam AIAPI
🧠 Language AI · Regional Invoices

India's AI unicorn. For invoices in Hindi, Gujarati, Tamil or Marathi script, Sarvam AI translates and normalises text before extraction — accuracy jumps from 70% to 97%+. Essential for CAs serving Tier 2 and Tier 3 clients.

Used in: Step 2 — Regional language invoices
Pay per API callTry Now →
Google SheetsFree
📊 Client Tracker · Master Ledger

Your client database, document tracker, GST reconciliation workbook and reporting dashboard — all in one place your entire team can access. Free forever. Every tool in this stack connects to it natively.

Used in: Steps 1, 2, 3 & 5
Free foreverOpen Free →
80%
Less client follow-up
97%
Invoice extraction accuracy
300+
Hours saved per year at 50 clients
₹0
Cost to start today

Common Questions

Do I need a developer to build this?
No. Make.com is entirely visual — drag and drop. Nanonets has a no-code setup wizard. AiSensy has a simple dashboard. If you are comfortable with Google Sheets and WhatsApp, you can build this entire workflow yourself in an afternoon.
What if my clients use different invoice formats or apps?
Nanonets handles virtually any format — printed invoices, scanned PDFs, WhatsApp photo forwards, even handwritten bills with decent legibility. You can upload samples and train a custom model in minutes if your clients use a very specific format.
Is this DPDP-compliant? What about client data privacy?
Your client data stays in your Google Sheet and Zoho Books account — you control access. Nanonets is SOC2 compliant. For maximum privacy, you can self-host the Make.com workflows using n8n on an Indian VPS, keeping all data onshore under India's DPDP framework.
What is the total monthly cost at scale?
Make.com free tier handles ~200 ops/month. At 50 clients with monthly runs, you may need the $9/month Core plan. Nanonets charges per page after the free trial — typically ₹500–2,000/month depending on invoice volume. Zoho Books free tier covers 1,000 invoices/year. Total cost for a 50-client practice: ₹1,500–3,000/month. A single additional client referral covers this entirely.

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The 20th is coming.
Start today.

Every month you delay is another month of midnight WhatsApp chases, manual GSTIN lookups and hours of reconciliation you could have automated. The setup takes one afternoon. The time savings start next month.

Start Free with Make.com → Set Up Client Reminders
Automate Your CA Practice Free2-hr setup · ₹0 to begin
Try Make.com Free →