Automate GST/VAT tax returns with OpenAI, Gmail and government portal integration
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
Nodes used (9)
- Schedule Trigger
n8n-nodes-base.scheduleTrigger - Edit Fields (Set)
n8n-nodes-base.set - HTTP Request
n8n-nodes-base.httpRequest - AI Agent
@n8n/n8n-nodes-langchain.agent - OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi - Structured Output Parser
@n8n/n8n-nodes-langchain.outputParserStructured - Calculator
@n8n/n8n-nodes-langchain.toolCalculator - If
n8n-nodes-base.if - Gmail
n8n-nodes-base.gmail
What it does
How It Works Automates financial aggregation, validation, and intelligent tax assessment. Integrates revenue, expenses, and invoices via scheduled connectors, merges data into unified records, and applies AI-driven analysis for anomaly detection and tax calculations. The system evaluates tax liability against configurable thresholds, intelligently routes filings to government portals or tax agents based on jurisdiction rules, and triggers automated email notifications for compliance deadlines and payment reminders. Designed for accountants, small business owners, and finance teams managing quarterly tax obligations while minimizing manual errors and compliance risks across multiple entities. Setup Steps 1. Configure OpenAI, Gmail, and Google Sheets credentials 2. Connect revenue and expense data sources 3. Define tax thresholds and jurisdiction-specific rules in workflow nodes 4. Map output fields to government or tax agent systems 5. Create email templates for notifications 6. Test the workflow with sample financial data before enabling Prerequisites OpenAI API key, Gmail account, Google Sheets, accounting software or data source connectivity Use Cases Quarterly tax filing automation, multi-client accountant workflows, enterprise compliance monitoring Customization Adjust tax thresholds by jurisdiction, integrate additional data sources Benefits Significant reduction in calculation errors, faster filing timelines, automated deadline alerts