"I wish to amend my return to remove my dependent daughter and claim her on her own return."
To be clear---you already filed a tax return and claimed your daughter as a dependent and now you want to amend and remove her as a dependent? She will not be able to e-file if you already filed a return that used her Social Security number, so she will have to mail in her own return that says no one can claim her. She does not have to wait for you to amend.
Another thing she can try that may work is to get a six digit IRS PIN and try to e-file:
https://www.irs.gov/newsroom/irs-takes-steps-to-help-prevent-refund-delays-by-accepting-duplicate-de...
https://www.irs.gov/identity-theft-fraud-scams/get-an-identity-protection-pin
When you amend your own return you will need to go to MY INFO to remove your daughter as a dependent.
Wait until your original return has been fully processed before you amend, and make sure you have saved a pdf of the original return before you amend. (If you do not save it as a pdf, the amended return will overwrite the original, and the original will be lost forever)
See this TurboTax support FAQ for amending a tax return -
CURRENT YEAR
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-curr...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
