Answer by
Att4372 (1704)
First, make sure your W4 is filled out correctly - filing status and number of dependents. Each dependent is worth $3650. For each $4,000 in outside income, decrease dependents by 1. For each $4,000 in deduction above the standard, increase dependents by 1. Alternate - estimate total annual income and figure tax. Divide by 52 to get weekly withholding.