Do I have to amend my 2023 Federal return by excluding the IRA contribution?
If you entered an IRA contribution that you really did not make, then, yes you need to amend your incorrect tax return.
See this TurboTax support FAQ for amending a tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...