Louisiana Revised Statutes Tit. 9, § 315.2. Calculation of basic child support obligation

A. Each party shall provide to the court a verified income statement showing gross income and adjusted gross income, together with documentation of current and past earnings. Spouses of the parties shall also provide any relevant information with regard to the source of payments of household expenses upon request of the court or the opposing party, provided such request is filed in a reasonable time prior to the hearing. Failure to timely file the request shall not be grounds for a continuance. Suitable documentation of current earnings shall include but not be limited to pay stubs or employer statements. The documentation shall include a copy of the party's most recent federal tax return. A copy of the statement and documentation shall be provided to the other party. When an obligor has an ownership interest in a business, suitable documentation shall include but is not limited to the last three personal and business state and federal income tax returns, including all attachments and all schedules, specifically Schedule K-1 and W-2 forms, 1099 forms, and amendments, the most recent profit and loss statements, balance sheets, financial statements, quarterly sales tax reports, personal and business bank account statements, receipts, and expenses. A copy of all statements and documentation shall be provided to the other party.

B. If a party is voluntarily unemployed or underemployed, his or her gross income shall be determined as set forth in R.S. 9:315.11.

C. The parties shall combine the amounts of their adjusted gross incomes. Each party shall then determine by percentage his or her proportionate share of the combined amount. The amount obtained for each party is his or her percentage share of the combined adjusted gross income.

D. The court shall determine the basic child support obligation amount from the schedule in R.S. 9:315.19 by using the combined adjusted gross income of the parties and the number of children involved in the proceeding, but in no event shall the amount of child support be less than the amount provided in R.S. 9:315.14.

E. After the basic child support obligation has been established, the total child support obligation shall be determined as hereinafter provided in this Part.