CHI HO CHIU

Hi, I am preparing to submit a tax return for a partnership, and I understand that I need to file: • SA100 and SA104S for myself • SA800 for the partnership I have a few questions: 1. If I submit the SA800 by post, can I still file the SA100 online, or do I need to file it by post as well? 2. If I file my self-assessment tax return online, does it automatically include both the SA100 and SA104S? Thank you very much!