"Coordinating data is a challenge that can be made even more challenging by various data issues that are likely to come up in the process. Gathering employment history data from payroll systems can be difficult, and even if you're able to get it -- possibly by paying a hefty fee to your payroll-services provider -- you may find it doesn't provide the detail about employment history that ACA reporting demands. Also, if you haven't been tracking employee leave (and why would you since there was no reason to before ACA?), you'll have to sift through the data manually to calculate leave earned and leave taken as ACA requires."  MORE >>