Symmetry Software is a company that provides cutting-edge payroll tax APIs and software tools designed to simplify the complexities of tax compliance for onboarding and payroll platforms. Symmetry's services include comprehensive solutions for calculating gross-to-net payroll taxes, integrating and automating withholding forms, determining local withholding tax rates, and tracking minimum wage rates across the U. S. and Canada. Their products allow payroll platforms to ensure accurate and compliant employer and employee tax calculations, ultimately optimizing and automating payroll processes. Trusted by leading onboarding and payroll platforms, Symmetry Software is known for its robust tax compliance infrastructure and technical support, making it a partner for companies seeking to streamline their payroll operations.