Handle missing HSA & FSA pay periods in Workday Benefits

This year is my first year running Open Enrollment! During testing, we found that Workday was showing one fewer pay period than it should have for the "Remaining Pay Periods" total for FSA. Workday showed 25 periods instead of 26. Turns out, there is a simple checkbox on the Benefit Group to solve this problem¹. Checking Include Pay Periods that End Before the Deduction Begin Date will force Workday to include the correct number of pay periods for FSA deduction calculations.

When we updated the checkbox after open enrollment was closed during testing, it seemed like it was too late to fix, but YMMV. Re-calculating payroll and/or correcting the open enrollment event during testing did not update the pay period count from 25 to 26 during my testing. If we'd missed this, it looks like Payroll would over deduct a little each pay period throughout the year and need to credit back the 26^th pay period worth of deductions to employees on their last pay check of the year.