Literally in my car praying for understandment of my daughter even though she's only four she talks…

Literally in my car praying for understandment of my daughter even though she's only four she talks down to me and is always so demanding. She is very strong willed and wants to be the bos regardless of the punishment. I don't want to get phisical woth her I don't want to be mean but i want her to understand SOS.