For 2011 the payroll year the US government has changed the Social Security tax rules. The maximum has not changed however the employee portion is now 4.20% instead of 6.20%. The employer portion remains at 6.20% as it was in 2010.
There are multiple ways to set up your overtime rules in Harmony's Time & Attendance module. All rules are 'grouped' ("Overtime Group") and rules within the Group are sorted in order of priority (i.e. rules with a higher priority will apply first).