(a) Whenever feasible, gross income should first be computed on an annual basis and then should be recalculated to determine average monthly gross income.
(b) The Title IV-D agency shall annually promulgate tax charts to compute net monthly income, subtracting from gross income social security taxes and federal income tax withholding for a single person claiming one personal exemption and the standard deduction.
Official text of the Texas Family Code as published by the Texas Legislative Council.