You can find a CWF1 Form Online if you need to register for self employment but already submit a tax return.  You must only use the CWF1 form online if you are already registered for self assessment and have a new form of income you need to declare. For example you registered as a Landlord but now have decided to start your own business so need to register for self employment.

You Can Find the CWF1 Form Online

You can complete this form online here. You’ll need to find your 10-digit Unique Taxpayer Reference (UTR) from when you registered for Self Assessment previously.

How to Find my UTR Number Online

Why Do You Need to Complete A CWF1 Form Online?

The CWF1 is a way of formally notifying HMRC that you have self employment income which you need to declare to them as part of your self assessment tax return and (depending on your earnings) pay tax and national insurance to them on.

I built this site to help self employed business owners grow profitable businesses by making the intimidating aspects of business and tax easy to understand with ‘How to’ Articles, Guides and Courses. Take a look around and you'll find all essential information you need to know to go self employed, launch a new venture and run a profitable business.