Trades Back-Office — HMRC sandbox

❌ Not connected yet

Test NINO: (set TEST_NINO in .env)

1. Connect to HMRC 2. List businesses 3. Open obligations

Filing engine (sandbox)

Business created this session: none yet

4. Create test business 5. Submit quarterly update 6. Tax calculation

Sandbox tip: add ?scenario=STATEFUL to use data you created with the Self Assessment Test Support API; leave it off to get HMRC's example data.