1) This document is the Form W-4, which employees complete so their employer can withhold the correct amount of federal income tax from their paychecks.
2) Key details include instructions on claiming allowances to reduce withholding, rules for multiple jobs or two earners in a family, and exemptions from withholding for certain taxpayers.
3) The form includes worksheets to help calculate the number of allowances to claim based on filing status, tax credits, deductions, and other individual situations. Taxpayers should complete a new Form W-4 for any changes in their circumstances.