Amending to add home office deduction

Hello,

I am trying to amend my 2023 filing, which was originally filed on desktop premier, to include a home office deduction for my 1099 income. I paid for the upgrade to home and buisness, but when I open it and select amend, it doesn’t allow me to open a prior return. When I open my prior return, it doesn’t give me the option to amend. I tried to follow the steps outlined online but was unable to figure it out.