1120 - If you have been given a 2017 to 2018 Class 4 NICs deferment certificate
If you're employed as well as self-employed, the National Insurance Contributions and Employer Office may agree that some of your Class 4 National Insurance contributions (NICs) can be deferred until your overall contributions can be determined. If your application for deferment is agreed they'll send you a deferral certificate (form CA2703 Granted deferment of liability for Class 2 and Class 4 National Insurance contributions).
If you have already been given a 2017 to 2018 Class 4 NICs deferment certificate select 'Yes' from the drop-down menu otherwise, select 'No'.
For more information see Defer your self-employed National Insurance.
If you want to apply for deferral contact HM Revenue and Customs.