i need a salary calculator formula for all us states for tax deductions i need it to do year to date taxes as well -- 2

please i need a simple calculator for salary i need the formula so i put how much my employee makes every check and the taxes auto get taken out i have 32 employees in 24 states MUST HAVE PAYROLL EXPERIENCE HAVE A PAYROLL COMPANY FOR MY SELF BUT NOW SINCE THEY ARE IN DIFFERENT STATES THE TAXES WILL BE ALL DIFRENT