As mandated by the Illinois Department of Revenue, covered employers must complete and file the Amended Illinois Withholding Income Tax Return, IL-941-X.
This guide provides compliance guidance for HR and payroll professionals regarding Oklahoma income tax withholding on residents, nonresidents and expatriates; supplemental wage withholding; Form W-2 reporting; and recordkeeping.
HR guidance on compliance with payroll taxes, including income taxes, Social Security and Medicare (FICA) taxes, and unemployment, disability and workers' compensation insurance taxes.