You have to look at the dates carefully. If you owed for 2024, Turbotax will assume that you will also owe for 2025, and will print out 2025 vouchers for estimated payments. These are optional (you could also reduce what you owe by making online payments or by increasing your paycheck withholding).
Unfortunately, if you made a payment with a paper slip dated 2025, that's how it will be applied. You still owe for 2024 and you can't "move" the payment in the IRS system. You still have to pay for 2024. However, be sure to report your 2025 payment in your 2025 tax software so you get credit for it, it will either reduce the tax you eventually owe or it will come back as a tax refund next year.
If you paid an application fee for a payment plan, that is unfortunately non-refundable.
You can pay your 2024 taxes online, no paper voucher is needed, just be sure to select "2024" from the menu. You can pay in full or make partial payments. If you can pay in full in 4 months or less, it will usually not be worth starting a payment plan, just pay as much as you can now, and pay the rest as soon as you can. If it will take more than 4 months to pay in full, you might want a payment plan, but you should apply directly on the IRS web site, not through your software.
https://www.irs.gov/payments/payment-plans-installment-agreements
