earned income calculation

[Chippy]

Does anyone know if there is a spreadsheet out there that I can use to calculate the earned income for the plan from the Self Employment earnings for a partnership? I have 2 spreadsheets that I use but neither one addresses the Section 179 expense. At what point does the Section 179 expense get deducted?

[Bird]

My notes say that it is taken off the top; that is, before the deduction for 1/2 of SE taxes.

[PensionPro]

179 exps are deducted before deduction of the employee cost and therefore before se tax calc. see instructions to box 14 of k-1.