HMRC Integration Hub
10+ HMRC APIs connected in one dashboard
Full Making Tax Digital integration with 10+ HMRC APIs. Pay HMRC, check VAT numbers, sync obligations, view Self Assessment balances, tax calculations, NI records, marriage allowance, employment details, dividends income, and reliefs — all from one hub.
Free during Early Access - No credit card required
Capabilities
OAuth-secured connection to HMRC sandbox and production
Pay HMRC directly from your dashboard
Check and validate any UK VAT number instantly
Sync VAT and Corporation Tax obligations automatically
View Self Assessment balance and payment history
Access HMRC tax calculations and breakdowns
Check your National Insurance record and contributions
View marriage allowance status, employment details, dividends income, and reliefs
How It Works
Connect your HMRC account
Authorize AccountsOS via HMRC's official OAuth flow. Your credentials are never stored — only encrypted access tokens.
Obligations sync automatically
VAT, Corporation Tax, and Self Assessment obligations are fetched and displayed with due dates and statuses.
Use the hub tools
Check VAT numbers, view tax calculations, review NI records, or pay HMRC directly — all from a single page.
Stay on top of deadlines
Real-time status updates show which returns are fulfilled, pending, or overdue so nothing slips through.
Use Cases
Quarterly VAT filing
View your VAT obligations, see which periods are open, and submit your return directly through AccountsOS with HMRC confirmation.
Supplier VAT validation
Before paying a large invoice, check the supplier's VAT number is valid and active. Avoid reclaiming VAT on fraudulent invoices.
Self Assessment overview
Directors with personal SA returns can see their balance, payment history, and upcoming deadlines without leaving AccountsOS.
Year-end tax review
Pull your HMRC tax calculation to compare against your own figures. Spot discrepancies before they become enquiries.
Benefits
One dashboard for all HMRC interactions
Never miss a filing obligation or payment deadline
Validate supplier VAT numbers before paying invoices
See your exact tax position without logging into HMRC separately
Reduce time spent navigating multiple HMRC portals
Encrypted token storage for secure API access
Frequently Asked Questions
Is the HMRC connection secure?
Yes. We use HMRC's official OAuth 2.0 flow. Your login credentials are never seen or stored by AccountsOS. Access tokens are encrypted with AES-256-GCM at rest.
Which HMRC APIs are supported?
We connect to 10+ HMRC APIs including VAT, Corporation Tax, Self Assessment, National Insurance, Marriage Allowance, Employment Details, Dividends Income, Reliefs and Investments, and more.
Can I submit VAT returns through AccountsOS?
Yes. AccountsOS calculates your 9-box VAT return from your transaction data and submits it directly to HMRC via the MTD API. You receive an official receipt with a form bundle number.
Does this work with HMRC sandbox and production?
Yes. You can test with the HMRC sandbox environment first, then connect to production when you are ready. The same dashboard works for both.
What if my HMRC token expires?
Tokens are refreshed automatically in the background. If a refresh fails, you will be prompted to reconnect — a one-click process that takes seconds.
Can I pay HMRC directly from AccountsOS?
Yes. The Pay HMRC feature lets you initiate payments for VAT, Corporation Tax, and Self Assessment directly from your dashboard with the correct payment references pre-filled.
Ready to try HMRC Integration Hub?
Get started with AI-powered accounting for your UK limited company.
Get Started FreeFree during Early Access - No credit card - Cancel anytime