The IRS extension for filing a 2023 tax return was on or before October 15, 2024. After that date a 2023 tax return or amended tax return can only be printed and mailed.
If you filed a 2023 tax return and now need to amend the return -
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-current-year/L7eS6o1qh_US_en_US?uid=lfunevhk