The 2023 tax return can only be amended using the TurboTax desktop editions for tax year 2023.
See this TurboTax support FAQ for amending a prior year tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...
For tax year 2024 you can use either the TurboTax online editions - https://turbotax.intuit.com/personal-taxes/online/
Or the TurboTax desktop editions for tax year 2024 - https://turbotax.intuit.com/personal-taxes/cd-download/
