Day 10 of Grant Thortons Top 10 Year-End Tax Planning Tips you shouldn't ignore.
Make Up a Tax Shortfall with Increased Withholding
Don’t forget that certain kinds of taxes are due throughout the year. Check your withholding and estimated tax payments now while you have time to fix a problem. If you’re in danger of an underpayment penalty, try to make up the shortfall by increasing withholding on your salary or bonuses. A bigger estimated tax payment can leave you exposed to penalties for previous quarters, while withholding is considered to have been paid ratably throughout the year.