I have just attempted to change the trading address for VAT for a client who has been registered for more than 20 years. This client doesn't need to use MTD so its the old HMRC VAT system. Changed the address a couple of years ago online with no problem. This time I was asked for a couple of letters from a "security question" - a memorable name. This was definitely never set up on the original online registration. Should I have tried X in both boxes? What I tried didn't work anyway so guess I just have to write in. I've just looked at the detail of all the info I input to register a client last year and there was no security question so is this a new thing this year or is it a glitch for clients registered for VAT but outside MTD?
Have managed to change the address without needing this security info on the SA part of the HMRC website for agents. For the VAT registration I have always been the only authorised person for the VAT so it is not done via the agents website - just the standard online system that clients use.