The P9X form is used to notify employers of what tax codes to use for employers. The form has been updated with tax codes to use from 6 April 2017. The basic personal allowance for the tax year starting 6 April 2017 is £11,500 and the tax code for emergency use is 1150L. As a result of the increase in the basic personal allowance, there is a general uplift of tax codes with suffix ‘L’ which have increased by 50. Employers should add 50 to any tax code ending in L, for example 1100L becomes 1150L. Form P9X is available online to download or print.The P9X (2017) form also includes information to help employers in the new tax year. For example, the document reminds employers that have new employees starting work between 6 April and 24 May 2017 who provide you with a P45 to follow the instructions atwww.gov.uk/new-employee