Before processing payroll, it is important to check for accuracy in payroll data and calculations. This can be done by: 1. Reviewing employee information and data: Verify that all employee information and data, including hours worked, salaries or hourly rates, tax deductions, and benefits, are accurate and up to date. 2. Conducting a test run: Use a payroll software system to conduct a test run of the payroll process to identify and correct any errors before processing payroll. 3. Reviewing payroll reports: Review payroll reports, such as the payroll register and tax summary reports, to ensure that payroll data and calculations are accurate.