# Process emailed PDF invoices into QuickBooks bills with OpenAI: n8n workflow

> Started by an arriving email, and works across Gmail. It hands the judgement calls to OpenAI.

Source: https://millionrounds.com/workflow/process-emailed-pdf-invoices-into-quickbooks-bills-with-open (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Money admin](https://millionrounds.com/workflows?category=Money+admin#library)

# Process emailed PDF invoices into QuickBooks bills with OpenAI

Started by an arriving email, and works across Gmail. It hands the judgement calls to OpenAI. 22 steps, 4 branches: large, and worth reading before you trust it with anything live.

Large Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fprocess-emailed-pdf-invoices-into-quickbooks-bills-with-open)

**22 steps** Large: read it before trusting it with anything live

**4** Branches: places the flow splits

**0** Loops or waits

**1** Service it connects to

## The flow

Starts it 1 Model 2 Logic 12 Service 7

The steps in the order they run, from what starts it.

- 1 **Gmail Trigger** Gmail trigger *Starts it*
- 2 **OpenAI Chat Model** Lm Chat Open Ai *Model*
- 3 **Config** Set *Logic*
- 4 **AI Extract Invoice Data** Information Extractor *Model*
- 5 **Extract Text from PDF** Extract From File *Service*
- 6 **Is Invoice?** If *Logic*
- 7 **Validate Extracted Data** Code *Logic*
- 8 **Is Valid?** If *Logic*
- 9 **Search vendor** Quickbooks *Service*
- 10 **Error: Extraction Failed** Gmail *Service*
- 11 **Vendor Found?** If *Logic*
- 12 **Prepare Bill Data** Code *Logic*
- 13 **Error: Vendor Not Found** Gmail *Service*
- 14 **Create Bill** Quickbooks *Service*
- 15 **Build Attachment Metadata** Code *Logic*
- 16 **Fetch PDF Binary** Code *Logic*
- 17 **Metadata to Binary** Code *Logic*
- 18 **Merge PDF + Metadata** Merge *Logic*
- 19 **Force Inline Binary** Code *Logic*
- 20 **Upload PDF to Bill** Http Request *Service*
- 21 **Send Confirmation?** If *Logic*
- 22 **Send Confirmation Email** Gmail *Service*

## How it's built

- **Starts on:** An arriving email
- **Steps:** 22, with 4 branches
- **Size:** Large: read it before trusting it with anything live
- **Connects to:** Gmail
- **Model:** OpenAI

## Questions

What does it need to run?

An n8n account, plus your own Gmail account, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an arriving email.

Does it use AI?

Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Take your time. At 22 steps it is large: read it before trusting it with anything live.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 22 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fprocess-emailed-pdf-invoices-into-quickbooks-bills-with-open)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Gmail](https://millionrounds.com/workflows?service=Gmail#library)

## Workflows like it

Also money admin, with the same services where possible, closest in size first.

- [**Extract and organize Colombian invoices with Gmail and OpenAI** 22 steps · calls a model · Gmail, Google Drive](https://millionrounds.com/workflow/extract-and-organize-colombian-invoices-with-gmail-and-opena)
- [**Extract invoice data from Gmail PDFs** 22 steps · calls a model · Gmail, Google Drive](https://millionrounds.com/workflow/extract-invoice-data-from-gmail-pdfs)
- [**Follow up on overdue invoices with OpenAI and Gmail** 22 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/follow-up-on-overdue-invoices-with-openai-and-gmail)
- [**Log email receipt data to Google Sheets with Gmail and OpenAI** 22 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/log-email-receipt-data-to-google-sheets-with-gmail-and-opena)
- [**Process and validate invoices from Gmail and forms with OpenAI** 22 steps · calls a model · Gmail, Google Drive](https://millionrounds.com/workflow/process-and-validate-invoices-from-gmail-and-forms-with-open)
- [**WhatsApp AI Agent with Payments and CRM** 22 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/whatsapp-ai-agent-with-payments-and-crm)