Renewing my tax disc at a Post Office

[Andypandy333]

Normally I renew my car tax online a few weeks before it runs out but this year it's kind of slpipped my mind. It runs out tomorrow!

Im going down to the post office this morning to get it sorted out but im not to sure what documents I will have to take for proof.

So before I head down does anyone know which ones I will need?

Thanks