Do I have to pay more than the child support amount per month?

Child support under the Statewide Uniform Guidelines is to cover the expenses incurred by each parent when the child is living with that parent.  The addition expenses that are provided for are: one-half of child care related to work or necessary education or training for employment skills, costs related to education or special needs of the child, and reasonable uninsured medical expenses.  You can Google Family Code §4062. If you have an order regarding the sharing of expenses for the child's extracurricular expenses, those would need to be shared as set forth in the order.   No other expenses are shared- that's what child support is for.