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HMRC VAT Authorisation

Updated 31 October 2026

Aedon.Accounting is recognised by HMRC for Making Tax Digital (MTD) for VAT, so you can submit your VAT returns straight from Aedon. Before you can submit, you need to authorise Aedon with HMRC by signing in with the Government Gateway account for the company. The authorisation lasts for 18 months, after which you sign in again.

Before you start

  • The company must be signed up for Making Tax Digital with HMRC.
  • You need the Government Gateway user ID and password for the company. If you don’t have them, ask whoever manages your VAT affairs.
  • The company’s VAT registration number, VAT method and VAT period must be correct on the company record in Aedon.Admin, Companies. Enter the VAT number without spaces or the GB prefix.

Authorise Aedon with HMRC

  1. Log in to the company you want to authorise, then click the App Launcher (the grid of dots, top left), search for Tax and open it.
  2. Click the HMRC tab. If the company isn’t authorised yet, Aedon shows a warning. Click Authorise HMRC(1).

The warning asking you to authorise with HMRC

  1. Read the statement about the information sent to HMRC, then click Sign in to HMRC(1).

The Sign in to HMRC page

  1. The HMRC website opens. Sign in with the company’s Government Gateway user ID and password, and click Give permission.
  2. You return to Aedon, where the HMRC tab now shows that the account is authorised with HMRC.

The HMRC tab showing the company VAT number and authorisation status

The authorisation status(1) is shown at the top of every HMRC page. To stop Aedon connecting to HMRC, use Disconnect from HMRC on the sign-in page.

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