I am trying to amend my 2021 tax filing as I received my corrected 1099 from from Robinhood, when I launch my turbotax desktop version on my Mac, I see option to "Amend a return (make changes) after it was filed and accepted by the IRS", on clicking that I choose "Yes, I have already filed my return" and "I need to amend my 2021 return" then it takes me to the page "what do you need to change on your return" but I don't see my existing filed return values to go and make correction, need instructions on how to correct the existing value submitted for stocks 1099-B. When I just update this income section, it considers the newly entered value as income and show heavy refund value, how to correct instead adding it as new value.