About this Form
If you are starting out in self-employment you must tell us straightaway.
If you are not starting within 28 days you cannot register yet.
National Insurance Number
- You must have a National Insurance Number before you can register for Self Assessment or self-employment
- To apply for a National Insurance number Phone Jobcentre Plus on 0345 600 0643
- You may be asked to go to an interview to confirm your identity.
Do not fill in this form CWF1 if you want to register:
- A new partnership , fill in form SA400.
- As a partner in a Partnership, Fill in form SA401
- As a director fill in form SA1.
- Partners who are not individuals ,for example ,companies and trusts should fill in form SA402