Buying a house has nothing to do with your W-2 withholdings. But you can use taxcaster at <a rel="nofollow" target="_blank" href="https://turbotax.intuit.com/tax-tools/calculators/taxcaster/">https://turbotax.intuit.com/tax-tools/...> to see what you want.

If you buy a house this year, you will only have a few months of property taxes and mortgage interest to deduct. Unless they (along with your other itemized deductions) are more than the Standard deduction, they will not benefit you for 2017.

Next year may be different, but keep in mind that Congress may make tax law changes this year.

<a rel="nofollow" target="_blank" href="https://turbotax.intuit.com/tax-tools/calculators/w4/">https://turbotax.intuit.com/tax-tools/calcula...>