Originally Posted by BBQ-Nut
.... I have estimated taxes for 2015 and have target dollar amounts as withholdings for both myself and my DW - is there a way to backwards calculate what to put on the W4 forms?
Say if we want to target a yearly Federal withholding of $6500 for my DW, can I work backwards to what a revised W4 would look like?
Yes you can. There are paycheck calculators out there that you can put in DW's earnings per pay period, withholding status, etc and it will calculate the various withholdings and her net check. Just play with the withholding status until the withholdings for a year are equal to your target.
If it were me, I would just adjust DW's so that her tax withholdings are equal to your total expected tax liability for the year and forget about having to do estimated taxes.