We kept getting audit requests asking for transaction-level VAT details. Our app store receipts lacked the fields authorities wanted.
By moving onboarding and checkout to the web I captured richer data: billing country, VAT id, invoice id, gross and net amounts, refund links, and user consent. That made building OSS reports and audit trails straightforward.
Has anyone built a VAT reporting pipeline from web funnel data to tax-ready returns? What fields did you store and how did you keep everything auditable?
I log each transaction with full metadata. Country code, VAT id, gross, net, tax amount, gateway receipt id and timestamp.
Those fields made it easy to produce OSS lines and answer auditors. We also store the original invoice PDF for every sale.
Shifting checkout to web via web2wave gave us access to those events directly.
Richer web events gave us the audit trail we needed. Every sale had a linked invoice, tax breakdown and the acquisition UTM.
That let finance reconcile VAT quickly and marketing attribute revenue per campaign. The speed of iterating on funnels meant we could fix holes fast.
Store the invoice id and tax breakdown with the user record.
Also keep the original gateway CSV exports. Those two things made audits painless for us.
Design your data model for audits. For each transaction store billing country, customer VAT id if any, net and tax amounts, currency, gateway receipt id, invoice id and timestamps for creation and any refunds. Keep a copy of the generated invoice and the raw gateway export.
Automate daily exports formatted for OSS and keep reconciliation jobs that flag mismatches. That reduces manual effort and makes audits predictable.
We added a nightly reconciliation job that compared gateway exports with our internal orders. It caught missing VAT ids and mismatched currencies early.
That saved hours during reporting month and prevented last minute surprises for finance.
Web funnels give you the data app stores hide.
Use that to create tidy OSS reports and keep copies of every invoice.