@sundepsony - follow @Critter-3 's advise.
That W-4 is simply to determine the withholdings or as I like to call it "the downpayment" against the tax that MAY be owned.
"tax" is only calculated on the tax return. Then the downpayment is applied against that tax liability and what is left over is either a refund or the Amount Due.
The point is the W-4 withholding is not binding, so be conservative on the W-4 under the circumstance.
