Federal, FICA, and state
Federal income tax uses the IRS brackets and standard deduction in the tax-year snapshot. FICA is Social Security up to the wage base and Medicare on all wages, using the SSA and IRS rates stored for that year. Additional Medicare tax is applied when wages cross the statutory threshold.
State income tax is only applied when this snapshot includes a verified wage-tax schedule for the state you pick. If it does not, the page will not invent a rate. Local city or school taxes are omitted unless a field asks for them.
