When I did my 2019 taxes I put that someone could clam me as a dependent but nobody can is their anyway I can fix that

To make the changes:

1. Log in to your account.
2. Select My Personal Information.
3. Select My info from the left Menu.
4. Click Edit next to your name and scroll down to edit your answers.

If you already filed your return you need to amend it to make any changes.

Here's how you amend your return:

1. Sign in to your account.
2. Scroll down to Your tax return & documents , select 2019 and then Amend (change) return. 
3. Select Amend using TurboTax Online.
4. Follow the instructions, your refund or tax due will change to 0. This is normal on amended returns.

Amended return can't be e-file, you need to print it and mail it in.