Employers can stay compliant with payroll tax and withholding regulations by following these best practices: (1) Stay up-to-date with the latest IRS and state tax regulations, rates, and deposit schedules; (2) Maintain accurate payroll records and documentation; (3) Use reliable payroll software or outsource payroll to a reputable provider; (4) Ensure employees provide accurate Form W-4 information and update it as needed; (5) Deposit payroll taxes on time and file quarterly and annual returns accurately; (6) Reconcile payroll accounts regularly and address any discrepancies promptly; (7) Consult with a tax professional or certified public accountant (CPA) for guidance on complex payroll tax issues or compliance concerns.