First Self Assessment

Hi, I'm registering as a sole trader as I've almost learnt over £1000 on ebay. I want to know if I need to back track any invoices before the point I register as a sole trader or is it just from the point of becoming a sole trader? Thankyou in advance 

Name removed admin .

Hi, 
It is from when you started trading
Please see Self Assessment tax returns: Overview

Thank you.