W 4 additional withholding percentage
The amount of additional withholding, as indicated on Line 4c of the 2020 W-4 (Line 6 on pre-2020 W-4s), is entered on Line 4a. You add Line 3c and Line 4a to arrive at employees’ final pay If the total withholding amounts is below $200/month decrease your Allowance number again by at least "1" and submit your W-4 (s) to your employer (s) again. Continue with this approach until you are at $200/month of IRS total tax withholding for the remainder of 2019 or close to that amount.