be deducted.HMRC may send you a tax code to collect the tax you owe through PAYE. Your responsibilities Your employer will give you details of the benefits they've told HMRC about on the P11D or P9D. You'll need to keep these details for two years after the tax year they relate to. You'll need this information to fill in your tax return. Bear in mind that you must tell HMRC about any benefits you or your family get from your employer, even if you've already paid tax on them through PAYE. Where to get help Your employer will be able to help if you've got any questions about the benefits you get with your job. If you need help with filling in your tax return you can contact the HMRC Self Assessment Helpline by following the link below.