New client switched to us who is already signed into MTD for VAT.
Spent a good few days becoming frustrated at the normal easy online agent authorisation process not working which was giving the answer 'failed'.
Checked the normal stuff like date of reg, last return submitted etc but couldn't get to work.
Light bulb moment thinking that of course if HMRC could mess up something that had worked for eons as part of their digital revolution then they would do so.
Sure enough there is a new process to be added as an agent if the client is already in MTD.
Log in with new ASA gateway code. Put in the clients VAT details then they get an email which they MUST click and log in with their own BTA credentials. Lots of assumptions by HMRC that clients have emails and BTA's going on here, but never mind its the future, innit.
(To be fair it was easier than waiting for the letter to be issued, client saying they never received it etc etc).
Client instantly appeared on my Agent Services Account the second they clicked the email (not my Online Services for Agents Account (yes HMRC you are total muppets for your naming conventions)) and software switched on successfully.
Looks like the phase out of the old gateway has started as MTD clients won't appear in your old VAT client list so everything will have to be done in the new ASA. Lucky they built such a super awesome ASA for live date.............