To use IRIS VAT filer you are required to authorise the software to interact with HRMC on your behalf. A number of steps are required to set this up and are detailed below:

  1. Create an Agent Services Account and link VAT clients

Creating the account is a one-off process for the firm to enable all staff to access MTD through a single account, this can be done using this link:

Once this process is complete you will be able to link all your existing VAT clients to this account by logging into any previously held accounts and submitting your firms UTR and new agent reference number.

  1. Register your clients for MTD

You are able to register your clients for MTD on their behalf. This requires a minimal amount of client information (e.g. Email address) that will be used as part of an identity check. Sign up is required even if the client is already registered for Income Tax MTD. Registration can be completed by logging in to

  1. Authorising IRIS

To submit returns using IRIS you will need to grant the software permission to interact with HMRC on your behalf, this authorisation will last for 18 months and can be revoked at any time by going to Setup | Authorised Agents