Create draft invoice-receipts in InvoiceXpress with Portuguese NIF validation

by Fluxo Pronto · 0 views · created 2026-10-10 · Invoice Processing

What this workflow does

This workflow has 10 nodes and runs manually, when you click “Execute workflow”. It uses only n8n's built-in nodes.

How it runs

Trigger: Manually, when you click “Execute workflow”.

1. Sample payment data (Edit Fields (Set)): sets 9 fields: nome, email, nif…
2. Configuration (Edit Fields (Set)): sets 10 fields: invoicexpress_base_url, invoicexpress_sequence_id, taxas_iva…
3. Prepare payment (Code): runs custom JavaScript code
4. Validate payment and NIF (Code): runs custom JavaScript code
5. InvoiceXpress: list taxes (HTTP Request): calls an HTTP API
6. Check configured taxes (Code): runs custom JavaScript code
7. Build draft invoice-receipt (Code): runs custom JavaScript code
8. InvoiceXpress: create draft invoice-receipt (HTTP Request): calls an HTTP API (POST)
9. Show result (Code): runs custom JavaScript code

Before you upgrade to n8n 3.0

Nodes used (4)

• Manual Triggern8n-nodes-base.manualTrigger
• Edit Fields (Set)n8n-nodes-base.set
• Coden8n-nodes-base.code
• HTTP Requestn8n-nodes-base.httpRequest

From the author

Quick overview This workflow runs manually to validate Portuguese NIF tax IDs, verify configured VAT taxes in InvoiceXpress, and then create a draft invoice-receipt (fatura-recibo) via the InvoiceXpress API, returning the new document ID and totals. How it…

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