Qualified children shall not include stepchildren or other minors in the home who the parent has no legal obligation to support.
In general, income and expenses from self-employment or operation of a business should be carefully reviewed by the court or the jury to determine an appropriate level of gross income available to the parent to satisfy a child support obligation. Generally, this amount will differ from a determination of business income for tax purposes.
Except as determined by the court or the jury, special pay or incentive pay, allowances for clothing or family separation, and reimbursed expenses related to the parent's assignment to a high cost of living location shall not be considered income for the purpose of determining gross income.
A determination of willful and voluntary unemployment or underemployment shall not be made when an individual is activated from the National Guard or other armed forces unit or enlists or is drafted for full-time service in the armed forces of the United States.
and this amount shall be deducted from a self-employed parent's monthly gross income.
When extraordinary medical expenses are claimed, the court or the jury shall consider the resources available for meeting such needs, including sources available from agencies and other adults.
OCGA § 19-6-15