The worst thing is you need a new form every year for every car in your garage if you never take them out & tax them! So you must not forget!
A form only covers 12 months max, why can't it be indefinite? There's gonna be loads of lads with cars stuck in sheds for years that haven't moved, no RF100 after September so in theory they are liable for back tax if they don't declare soon. Complete cluster fcuk.