Basically the answer is the $10,000 that will get you to the next tax bracket. But the great American tax system is so convoluted, you can't always go by that the simple answer. Critter#2 is right, you need to do mock returns. TurboTax download software is better for that than online.
You could try this tool, which is available now: <a rel="nofollow" target="_blank" href="
https://turbotax.intuit.com/tax-tools/calculators/taxcaster/?s=1">https://turbotax.intuit.com/tax-to...>
