You can apply for exemption from paying vehicle tax if you get the:
The vehicle must be registered in the disabled person’s name or their nominated driver’s name. It must only be used for the disabled person’s personal needs. It can’t be used by the nominated driver for their own personal use.
Your exemption certificate must be one of the following:
You must claim at a Post Office that issues tax discs if you’re claiming for a particular vehicle for the first time. You can’t do it online or by phone.