aas a side note; Just be careful that you aren't underpaying as a result. While you can count your federal income tax withholding in your estimated tax calculation, in some sense it was earmarked to pay taxes on yourW2 income, not your self-employment income. Federal withholding is considered paid equally throughout the year of 2016 regardless of when it is actually withheld and paid by the employer. You can choose to equally apply one fourth of the withholding to each quarterly estimated payment. for Example, say,
Total federal withholding is $6K /4 = $1.5K per quarter
Each quarterly payment can be reduced by this amount, so if you need to pay $2K as a quarterly pmt then, $2K-$1.5K=$500, you need to pay for each quarter aslongas $1.5K is equal/ exceeds your quarterly pmt for self employer income , then you do not need to pay quaretrly estiamted taxes for your self employer income but your ER still needs to withhold the whole amuntof $6K from your paycheks |