@zuniga.mike ...........Try looking at the calculator again .....there's no way for us to know all the details of your personal situation, and the calculator covers almost all situations .
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1) You put in your W-2 pay BEFORE withholding is considered.....and that is something you already know
2) There are boxes to put withholding in that has already occurred, but you don't have to enter anything in those boxes (leave those at zero) if you are just starting out with a new job.
You can also put in a zero for the current W-2 allowance...because at the final calculation, you can adjust it up to some other value.
3) For the spouse's paycheck, you click on "My spouse did not receive a paycheck"
4) and the next page has a place to enter Her expected NET Business Income (Self-Employment profit)....which is critical for you to enter, because that SE profit will likely be taxed at ~30% total (SE tax at ~15% PLUS 15% income tax). and figuring that in is critical in that your W-2 withholding can thus be adjusted to cover that too. Yes...it varies...but you really need to guesstimate something.. take an average for the last couple years and round it down by 20 or 30% (she's pregnant...realistically, how much longer is she going to work )
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*