Owing at the end of the year doesn't change the total amount of tax you have to pay. If you want to keep the amount due at the end of the year down, just increase your withholding on your W4. If the amount you owed last year was $1200 and your income and tax situation is about the same this year, then you can just have an extra $1200 withheld from your paychecks over the course of the year.