This is due to the new tax law, with employers not withholding enough from your paycheck.

If you're used to getting a tax refund, that may change this tax season. 

A recently released study, performed by the United States Government Accountability Office, shows more Americans will end up owing the IRS, even if you typically get money back.

This is due to the new tax law, with employers not withholding enough from your paycheck.

"In the past, taxpayers were able to protect some of their income knowing 'hey, at the end of the year, I'm not having as much withheld as the government, or the IRS says, because by the end of the year I know I'm going to itemize and my deductions will be greater than the standard deduction,'" explained David Stauber with Liberty Tax Service in Rochester.

Over years of trial and error, many taxpayers have figured out the right equation for them to balance out their taxes.

However, with changes to tax laws that balance will be thrown off.

"The classic example we see are individuals, maybe a joint income household of $100,000-160,000 that typically itemized in the past, now aren't allowed to, don't have children, no longer have dependents on the tax form, those are the ones I feel will have the biggest surprise coming," expressed Stauber.

While in the off-season, Stauber and his team are looking through their client list to see if they can help them change their current plan, and protect them from having to write a massive check to the IRS in April.

The GAO predicts 21-percent of taxpayers, nearly 30-million people, will owe money. They may be getting a bigger paycheck now, not realizing their employer isn't withholding enough money to cover their taxes.

"The IRS is trying to get refunds closer to zero. That's the idea, give them more spending cash, more out of the economy," said Stauber, who suggests comparing your current take home pay to your past tax returns to make sure the money will cover your return.

The full GAO study can be found here.