. . . . . "Section 199 : deduction relating to income attributable to domestic production activities"@en . "Section 199 : deduction relating to income attributable to domestic production activities" . . "\"... discusses the deduction available to taxpayers that engage in qualifying domestic production activities, including the formula for computing the deduction and the various attributes of that formula. \"" . . . . . . "Deduction relating to income attributable to domestic production activities" . "Deduction relating to income attributable to domestic production activities"@en . . . . . . . . . "Section 199 deduction relating to income attributable to domestic production activities" . .