Why do I owe CA state taxes, I have always gotten a refund in the past. It is showing I owe 299.00 CA Tax Due

If you received wages that are taxable by a State, the State may be entitled to a certain amount of annual tax total that your employer may not have been deducting enough each payroll period to cover it.

If nothing has changed on your part such as a dependent moving out, it may be possible the formula your employer used to calculate how much to deduct each payday from your taxes did, or it's possible the State's formula has changed for certain situations in your tax return compared to last year.

This is the simplest scenario. For anything more you'll need to provide more information.