use the online service (sign in to, or set up a Government Gateway account)
fill in the form on-screen, printing it off and posting it to HMRC
If you use the online form, you’ll get a reference number that you can use to track the progress of your form. To tell HMRC you’ll need to have your Unique Taxpayer Reference number (UTR) or VAT reference number in your Business Tax Account. You can add this from your account homepage.
Real Driving Emissions 2 (RDE2) (also known as Euro 6d) compliant diesel cars for tax year 2018 to 2019
To report a diesel company car which is RDE2 (also known as Euro 6d) compliant select ‘Fuel Type A’.
Before you start the postal form
If you’re using an older browser, for example Internet Explorer 8, you’ll need to update it or use a different browser. Find out more about browsers.
You’ll need to fill in the postal form fully before you can print it. You cannot save a partly completed form so you should gather all your information together before you begin to fill it in.