Car Seat Question!!!

Tricia • May Mama💕

My daughter is in an infant car seat but the max height is 30 inches and max weight is 30 pounds.

So, she is nine months old, almost ten. She weighs 22 lbs and is 29 inches tall. So, when do I know to get her a new car seat, do I go by the weight or height or both or which ever max she hits first? Thank you!