For the federal penalty. That is common. The amount Turbo Tax calculates on your 1040 line 38 is only an estimate. Turbo Tax can not figure it accurately because they don't know exactly when the IRS or state will get your return and tax due payment. It's very common and normal and expected for the IRS or state to bill you for more or send you a refund.
For California SDI excess. CASDI is like federal Social Security and Medicare. It is a mandatory withholding and tax. If you have more than 1 employer and together the CASDI went over the max you can get the excess SDI back. And it is for each person. So if you are married you have to enter each W2 under the right spouse or it will look like 1 person went over the max. That is a common user error.
2023 CASDI is 0.90% on a max of $153,164 of wages. Max is 1,378.48.
