Thank you for asking! I recommend using our W-4 Calculator at https://turbotax.intuit.com/tax-tools/calculators/w4/, which will indicate how you should complete your Form W-4 to accomplish the amount of withholding you want to choose.
Any time you adjust withholding, it is a good idea to double-check the amount of tax you expect on your return, which you can do by using our Taxcaster calculator at https://turbotax.intuit.com/tax-tools/calculators/taxcaster/.
