You need an HGV tax disc for lorries with a maximum weight of more than 3.5 tonnes when loaded.
You’ll need to provide a V5C vehicle registration certificate (log book). You can apply for a replacement log book if you don’t have one.
Tax rates for HGVs
The amount of tax you need to pay depends on your vehicle’s tax band, whether it has road friendly suspension and whether or not you have a Reduced Pollution Certificate.