is the paper form only way for split year treatment application

Hi I would like to know if the paper form(SA109) is the only way to submit for split year treatment or i can do it online by digital form, together with SA100 ? many thanks

Hi schangh,
You can do it online only if you use 3rd party sofware.
You cannot do it with HMRC normal return submissions:
Self Assessment commercial software suppliers
Thank you.