TurboTax 2025 premium computed my California Tax underpayment incorrectly?

[fuyunling]

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!

[fuyunling]

I looked into how TurboTax Premium calculates CA Tax penalty.  As regarding to penalty avoidance, it appears they only considering the requirement of 90% of current tax but didn't considering the 110% of previous year tax requirement.  If it is indeed the case, can TurboTax fixed that before the filing season is over?

(P.S. Sorry I spelled Penalty incorrectly previously.)

[fuyunling]

I have it figured out.  It appears that I need to enter the last years tax paid in the state review in order for TurboTax calculate the penalty correctly.