Attaching extra forms with SA100

I am expected to fill is additional forms for self employent and also SA107, receiving money from a deceased persons estate. Am I allowed to fill in paper copies, scan as pdf files and attach with SA100, giving me additional time to Jan 24 to complete? I may not have information required to complete SA107 in time for October. Thanks

Hi
The October deadline would still stand, however you can send amendments to the return after this date.
If you can't send all the pages on time this could mean that we are unable to generate a correct tax bill before the payment due date in January.
Thankyou.

Thanks, if the deadline will be stil be October, I'll just use paper copies and return what I can complete in time. Thank you