I found out I have to mail it because it's an amended return but even though I'm mailing it I would like to upload my bank account information so the return can be direct deposited how do I do that

Please see this Turbo Tax FAQ on how to change your refund method. https://ttlc.intuit.com/community/refunds/help/how-do-i-change-my-refund-method/00/26458

They only mail checks for refunds.  No Direct Deposit.

See 1040X instructions top of page 17

https://www.irs.gov/pub/irs-pdf/i1040x.pdf

It says.....You will receive a check for any refund due to you. A refund on an amended return can’t be deposited directly to your bank account.