Just file your tax return as usual. Because the formula that the IRS requires for taxing a paycheck containing a bonus sometimes over-estimates the tax owed on the bonus, you may get a larger than normal tax refund this year. Remember that the tax you owe for the year is only calculated on your tax return, and takes into account all your total income, credits, deductions and dependents. If you paid more into the system via withholding or direct payments than you owe, whatever the excess is comes back as a tax refund.
