If you have Enterprise you have to create your own programming. I created work entries for each type of activity (sick, vacation, work from home, overtime, etc.). Then create rules based on percentages for each rule. For example Work Entry Type code LEAVE102 is linked to a specific time off (i.e. Personal time). The salary rule looks like this..

Condition Based On: Always True

Computation

Amount Type: Percentage

Percentage based on: contract.hourly_wage

Quantity: worked_days.LEAVE102 and

                worked_days.LEAVE102.number_of_hours

Percentage: 100.00

For taxes you have to create additional salary rules. For example FICA-Social Security would look like this...

Condition based on: Always true

Amount Type: Percentage

Percentage based on: categoried.GROSS

Quantity: 1

Percentage: 6.20

And you could list the Partner as the IRS or EFTPS (Electronic Federal Tax Payment System)

*You would have to create this rule as a deduction so it comes out of the employee portion and then create a duplicate rule that is a company contribution so it does not come out of the employee pay. 

You can use these as the basic formulas to set up all the rules you need. 

*Remember you work entries have to be accurate to reflect the appropriate time off, OT, attendance, etc. or the payslips will not calculate correctly.

Hello.

You can create your own calculation formula using the module below. This module it 's more simple to work with payroll: