When I click on the security in the portfolio view and hit "edit", I'm not able to edit that info.
When I go to each transaction, I can edit. Is the box labeled "price paid" where I should enter the basis? I'm guessing yes since there's no other price box. I see, too, that I can edit the acquisition date here. If the "price paid" is where I should enter basis, you've helped me figure this out.