MCC

Hi, I have a tax account that is clearly labelled "Business tax account" at the top of the page, with a section for Self-assessment which I use for my sole-trader taxes and a section further which links to my personal tax account. I want to register for VAT and tried doing this (via the 'Add a tax to your account' option) but I keep getting an error that reads "You need to use a business tax account for this service", but I already have one. I thought that maybe I needed to create a new one, so I followed the link to create a new one with a different email address but haven't clicked on Declare yet (as I thought to check here first), and the page has now timed out. So now I'm both confused and concerned as I potentially have a duplicate account out there now under a different email address and I can't seem to register for VAT on the account I use for my business. Any help would be appreciated, Matthew