To amend a return..only needing to make 1 change, do i fill it all out or just the area/question i need to amend?

waiting for months on my stimulus check, KNOWING im eligible under all guidelines. Spoke w a woman thru IRS about month n hlf ago. She wouldnt look into my stuff sid not ask my name but told mr its just a waiting game. Spoke w a man couple wks ago he said i need to amend my return bc apparently when i done it thru turbotax i must've accidently checked "YES" to question 'can anyone claim you as a dependant?' When obviously meant to and should've checked "NO"! Clearly it was a mistake...you cant file taxes and be claimed unless you make under like 5 to 10 grand whole yr. Mine was over that. Anyway i printed the form i need but how do i do it? Do i redo all of it w all same info (bc its just the 1 question needing changed) or do i leave all blank just change the 1 question i had made the error on. Its obviously for this year...2019 return. Ive gotten both state and federal returns back in feb. No changes or anything just need to fix that 1 yes to a no in order to receive my stimulus. Idk how the IRS didnt catch this mistake anyway?