Use form CWF1 to register as a self-employed sole trader.
Only use these forms if you can’t use the online services because you’re self-employed but you’re already registered for Self Assessment. For example, you may have sent Self Assessment tax returns before as an individual, eg for rental or investment income.
Before you start
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You’ll need to fill in the form fully before you can print it. You can’t save a partly completed form so we suggest you gather all your information together before you begin to fill it in.
Related forms and guidance
Tax agents and advisers: authorising your agent (64-8)
Use form 64-8 to authorise HM Revenue and Customs to communicate with an accountant, tax agent or adviser acting on your behalf.