Engineering

How TapTax is built: working with HMRC's Making Tax Digital API and keeping your data safe.

Engineering
We Tested AI on 116 UK Receipts and Invoices: 99.8% of Core Fields Right, Till Receipts the Weak Spot
An open benchmark of AI document reading on UK receipts, invoices and credit notes: 99.8% of core fields and 95.6% of line items read correctly, bars committed in advance, and every failure mode published.
8 Oct 202611 min read
Engineering
5 things that surprised me building on HMRC's Making Tax Digital API
Engineering notes from building a real MTD integration: Accept-header versioning, fraud prevention headers, cumulative quarterly updates.
3 Jul 20267 min read
Engineering
Encrypting OAuth tokens at rest in a Node tax app (AES-256-GCM)
Why provider-level encryption at rest is not enough for OAuth tokens.
3 Jul 202610 min read

TapTax imports your bank statements, categorises expenses automatically, and submits quarterly updates to HMRC. Free plan, no card required.

Engineering articles