TurboTax 2025 premium computed my California Tax underpayment incorrectly?

The amount of my 2024 California tax was $X.  My 2025 total payment (witholding + estimate tax payment) was $(1.10645*X).  According to CA's estimate tax requirement, there should be no underpayment panelty.  However, my TurboTax calculated that I need to pay $24 panelty.  Can somebody help me to find out how and where the panelty is calculated or is a mistake made by TurboTax?

Thanks!