🔥 In this video, I show you how to build a complete AI-powered Invoice Automation System using n8n, Groq AI, Google Sheets, Google Docs, Google Drive, PDF.co, and Gmail — fully automated from form submission to sending the final invoice!

Whether you’re running a business or building automation workflows for clients, this step-by-step tutorial will help you generate professional invoices automatically with zero manual work.

🚀 What This workflow Does
✔ Accepts invoice data using an N8N Form
✔ AI cleans & structures the item details
✔ AI extracts customer details from Google Sheets
✔ Automatically clones a Google Docs invoice template
✔ Auto-fills all invoice fields (items, prices, totals, date, etc.)
✔ Auto-updates Invoice Number in Google Sheets
✔ Converts the invoice into PDF
✔ Splits out only Page-2 with PDF.co
✔ Sends the final invoice PDF via Gmail
✔ Notifies via Telegram that the invoice was successfully sent
✔ Everything 100% Automated

🧠 Tools Used in This workflow
n8n (Automation Orchestrator)
Groq AI (Ultra-Fast LLM)
Google Sheets (Customer Database + Invoice Counter)
Google Docs (Invoice template)
Google Drive (File Storage)
Gmail (Email Invoice Sender)
PDF.co API (PDF Split for Page 2)
Telegram Bot (Success Notification)

🔧 workflow Highlights
Dual AI agent pipeline (Pre-processor + Final JSON builder)
Advanced JSON parsing & data mapping
Automatic invoice numbering logic
Instant PDF generation & page extraction
Auto-emailing with attachments
Professional invoice formatting
✦ You can easily adapt this system for your own business or clients.

📌 Who This tutorial Is For
Business owners
Freelancers
n8n automation builders
Agencies
Developers
Anyone who wants hands-free invoice generation

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