n8n Tax Reporting Workflow

I need a complete n8n workflow that automatically matches each purchase my company makes with the corresponding payment so our quarterly tax reporting is painless. All data will live inside n8n; I simply want the flow to pull every new invoice I add, reconcile it against its payment record, then summarise what is deductible and ready for submission.

Here is what I expect the workflow to do from end to end:

• Watch for a new or updated invoice record.
• Locate the matching payment entry.
• Flag any inconsistencies (amount, date, missing fields) and send me a Slack or email alert.
• Aggregate the reconciled data into a single tax-ready report (CSV or Google Sheet is fine).
• Trigger a confirmation once the report is generated so I can file it immediately.

Everything needs to be built with standard n8n nodes—no custom code unless absolutely necessary—so I can maintain it myself afterwards. A short hand-off video or annotated screenshots explaining each node will be part of the final delivery.

If you have experience setting up similar finance or tax-centric flows in n8n, let’s talk; I’m ready to get this running right away.