Guys, thanks for all the discussion but I do feel like I am being judged here more than being helped, which is what I was recommened to come here for.
By judged, I mean, people seem to be looking for things that arent there.
Regarding car tax....you don't have to purchase a minimum of 6 months - you can buy car tax on a direct debit , for example if you were to tax your car today - the data will show it's valid until October 2025, but you are still paying monthly and can cancel it / sorn it at any point and data will reflect that month of cancelled tax.
In my case, I was in and out of the country for the past year, however was in the UK beginning of 2024 until April 2024, when I bought the car, obviously registered it to my UK address, but got offered a job abroad a few weeks later and decided to take the car with me. Car Tax was on a direct debit and completely forgot to cancel/sort it in April, so only done this in July, hence it is showing July. Straightforward.
Secondly, there was no PCN's that arrived to my UK address from TfL, as I mentioned in my first post, that we did have problems with post during the summer period, once a week postal service or non at all at time.
The first I heard about this fine was the CDER letter that come to my UK address, hence why I am here to ask for advice on how to deal with it now.
Should any letters arrived from TfL, of course the fine would have been paid as I know that my ignorance to ULEZ is my fault, but I was not given the opportunity to deal with it.