You will need to supply DVLA with a payment method to change taxation class. They may also need some extra documentation for vehicle tax change. The specific application forms needed will depend on the type of vehicle you have.
As a rule, vehicle tax is exempt, or paid at a lower rate, where it gets used by:
A disabled person.
An organisation that provides transportation for disabled people.
Different Methods for Changing Vehicle Tax Class
The correct method to change taxation class depends on whether:
Then you need to calculate the difference between the old and the new rates of your current vehicle tax. For example, if the old rate is £200 and the new rate is £260, then the difference would be £60.
The next step is to divide the difference by the number of months you pay tax over. For example, £60 divided by 12 months is £5.
Then multiply this by the number of months that remain on the tax. For example, 5 multiplied by 6 months is £30.
Having calculated the new rate you must then pay the extra vehicle tax. In this particular example you would need to pay £30 extra tax.
Follow UK Rules for 2019 Updates!
If Tax Rates Increase or Decrease
When the tax rate increases you must pay the higher rate from the first day of the month that you change the tax rate in. You would pay the lower rate from the first day of the next month if the tax rate decreases.
Change Tax Class: Not Due to Expire
Use the V70 form to change vehicle tax class providing the tax is not close to running out. But, you should use a different method if you already received the reminder letter or the 'last chance' warning letter (see below).
In some cases you must change car tax class at a Post Office branch that deals with road tax. This applies where the vehicle tax is due to run out, you received a reminder, or you got a 'last chance' warning letter.