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
Note - The 2024 federal amended tax return, Form 1040-X, is estimated to be available for filing using TurboTax on 02/20/2025.
If you forgot to enter your SSA-1099 when you filed your tax return, you can file an amendment, once your tax return has been fully processed. @easthampton4 Directions for both, amending and entering your SSA-1099, are below.