SA107

The SA107 is a form that you have to attach to your main SA100 Self Assessment form if you need to declare income that you received from a trust, settlement, or a deceased person’s estate.

To submit it, download it from HMRC’s website, fill it in, then send it to HMRC by post before October 31st.

Of course, if you decide to submit your tax return online, you don’t need to worry about mailing it to HMRC. Plus you get a longer deadline – January 31st of the following year.