To do this please follow the steps below (Please note - HMRC website pages may have changed since the steps below were added in Dec 2020):
You will need your company number if you are a limited company and also need their corporation tax UTR number. The website for Sign up is https://www.gov.uk/guidance/sign-up-for-making-tax-digital-for-vat, and the link for this is added as a hyperlink in this article.
Once on to the website click Sign up now>.
When asked; Do you have accounting software managing your VAT records? Choose Yes, I have accounting software.
When asked; Is your software ready to submit your Making Tax Digital for VAT Returns directly to HMRC? Choose Yes, my software submits through Making Tax Digital for VAT.
When asked; Do you have more than one registered business? Choose Yes or No.
When asked; What type of business are you registered as? Choose the relevant answer i.e. Limited Company
If you selected a Limited Company to the last question then you will be prompted for your company number: enter your 8-digit company number registered with Companies House.
When asked; What is your company's Unique Taxpayer Reference number? Enter the UTR number for the firm. This can usually be found on your Corporation Tax letters and is usually 10 digits long.
You will then be asked to check all of your answers, once checked click, Continue.
The next window that pops up, will ask you to accept the terms of participation to MTD. Once read and understood click Accept and continue.
This should complete the registration process for your firm to use MTD on the HMRC Portal
Now Open your DPS SQL Config
FYI - Once opened you should already be in the Company tab, the email address saved on this screen is the email address that needs to be registered with HMRC.
Click on the Accounts tab, then under the Accounts menu, HMRC Settings.
On the next screen tick Use HMRC Online Tax Service, then enter your VAT Registration Number then click Test API Connection.
The API test should now return a Successful test which means you will now be able to Post (submit your VAT returns within the DPS VAT Return module).