I want to amend my return and change the status to dependent

[DoninGA]

Before starting to amend the tax return, wait for the tax refund to be received or the taxes due to be paid and processed by the IRS.

See this TurboTax support FAQ for amending a current year tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-curr...

You change your dependency status in the My Info section using the online editions or in the Personal Info section using the desktop editions.  

[VolvoGirl]

And did someone's return reject because they tried to claim you?  They will have to mail their return.  Although you can't efile 2023 or prior anymore, anyway.   They don't have to wait for you to amend to mail their return.