Child care and child support

Is there an age where child care can no long be calculated into child support numbers? I have a 12 year old
who is in 7th grade. I haven’t had my support modified since the child was age 9 and wondering if I can get it reduced.
My ex (who doesn’t work) still pays someone to be at the house when my child gets home from school so my ex can
shop and do “personal” stuff.

The only child care that should be used when calculating support under the child support guidelines should be work-related child care.