We use Gusto. It is a well-designed, full-service package with a good reputation and tons of features.
Whatever plan you choose, you get all the following features: automatic payroll runs and new-hire form filing, federal, local, and state payroll tax filing, and child-support payment distribution. You also get accounting software and time-tracking integration, wage garnishment deductions, two-day direct deposits, workers comp administration, and W-2/paystub access for employees. We just love the features and functionality of this software. Even on the basic plan, it does everything we need, and so much more.
-Amy and Andy, the “We” in OhWeCook