You can move the amount by means of a trustee-to-trustee transfer to another IRA, or roll over the amount to your 401(k). You would need to check with your current employer to determine if it will allow the rollover. This way, you will keep the amount in your retirement nest egg and defer paying incomes tax on the amount.
If you withdraw the amount, it will be taxed based on your tax bracket. Your tax preparer should be able to tell you your tax rate.
To learn more, read Common IRA Rollover Mistakes.