Is business car mileage reimbursement attachable as child support?
If your question is, is it income, yes.
Only income is used for the calculation of support. By "attaching" are you asking if the reimbursement can be taken for past due support? If so, I say no it isn't attachable. I also say it is not income to be used in the calculation of support. It is reimbursing you for your expenses.
Generally if the money comes in the paycheck it is includeable as income. If there is a seperate check then it is not. But the actual amount of the expense is deductable from the reinbursement. A lot of this must be decided by the Judge.