Thank you for replying,
I did go there and look and there is nowhere to add the details to do it.
It advises going to the post office that deals with car tax,
but I am ringing the DVLA later today to speak to someone in person.
Will post update when I find out more.
Well update and upshot is that they are saying the tax class cannot be changed..
suck it up and be ripped off...
Something to do with first registration,
I am shocked at how immovable that is,
with no explanation as to why that is immovable.
Feel like I have been fobbed off.
To add insult to injury,
the green slip number,
that was perfectly acceptable on line last night to buy tax, has somehow changed.
The guy I spoke to said the number I have given is not of the most recent log book.
Weird as there has only ever been one issued,
I have the green slip number for it,
it worked last night and today they are saying its invalid...
. enough to make you go buy a donkey...