TurboTax penalty calculation

Turbotax deluxe estimated a tax penalty on my return of $347, but I don't see where it ever asked for dates of income. How does it calculate this penalty? Most of my income came from long term capital gains in November and an IRA rollover to a ROTH IRA in December. My other income came from monthly interest and dividends in which no tax was taken, and from monthly pension and job income which had taxes taken out. I carried over a 2023 refund to 2024 taxes and paid estimated taxes that I believe covered taxes owed. I believe that TT calculated all my income equally over the whole year, instead of just in the 4th quarter when the cap gains and rollever were realized. I can find no forms in TT that show how it was calculated. How do I find out how it was calculated? I manually filled in form 2210 and it appears to show no penalty .