Boost your Withholding
Boosting your tax withholding can help you avoid an underpayment penalty. You're off the hook from the fine as long as you prepay at least 90% of 2016's tax bill or 100% of what you owed for 2015 (110% if your 2015 AGI was more than $150,000). You can have more tax withheld from Nov.-Dec. paychecks or a year-end IRA payout. Tax withheld at any point during the year is treated as if paid evenly over the year.