Thanks for your reply. I have not doubled up any income, as far as I can tell, since I let the federal entries carry over to the state side. The only things I can think of is that my CA AGI is incorrect or TurboTax is not taking into consideration my CA state withholdings for 2020. I've been trying to figure out my 2020 estimated CA AGI to double check TurboTax's work, but I can't figure out how to calculate it on my own.
