I don’t understand your question. What are you trying to do? Are you asking about 2025 returns we file next year in 2026? Online is currently only for 2024 until Oct 15,2025 then it will close. Then in November or early December Online will open for 2025. Do you want to estimate 2025 taxes?
The Desktop download program is only good for one year. You have to buy a new separate program for each year. Turbo Tax only supports and sells the last 3 years, so back to 2021.
And...you cannot wait and put 2024 income on a 2025 income tax return next year, if that is what you meant. Each tax year's return has to be prepared and filed using the forms and software for the specific tax year in which you received the income. If you are getting a refund or do not owe, you have up to three years to file your tax return, but it must be done on the forms for the correct year. If you owe tax due, and you miss the filing deadline without paying, you will be subject to late filing penalties and interest owed.