I'm trying to amend my 2021 tax return to include a schedule D and can't find where to access it. Where do I find adding a schedule D for an amended return in TT?

The IRS isn't including the basis in my stock sales so I need to add the detail to all my transactions in an amended 2021 return, which means I need to input them into a schedule D, I think.  I can't figure out how to navigate there.