Regarding contributions that you made directly to the Roth IRA, normally you would have been entering those into TurboTax over the years so that TurboTax could maintain the tracking of those. If you haven't been doing that, you would need to enter into 2024 TurboTax your basis from contributions made for years prior to the 2024. For an ordinary Roth IRA contribution made for 2024, you would enter that under Deductions & Credits.
Nothing reported on your W-2 is a Roth IRA contribution. Enter amounts in box 12 of your W-2 only in box 12 of TurboTax's W-2 form, nowhere else in TurboTax.
