Can I amend my accepted personal return accepted to include my 1120S/K1 from my LLC filing as a s-corp?I haven't filed the 1120S yet but have a copy from my accountant

I need to amend my personal tax return that has been accepted to include my 1120S from my LLC filing as a s-corp, my accountant has produced the 1120S but I have not mailed them in yet. What step should I take?