The IRS said 104,700 Texas taxpayers are owed $115,580,000 from 2013 federal income tax returns.

That's an average of around $830 per person.

If you're eligible for a 2013 federal tax refund, you have until April 18 to file.

Ed Villanueva is a local tax agent who said he gets many clients asking about refunds from previous years.

"What they're missing out on is they may be entitled to a refund for example if they were employees and they had federal withholdings taken out, they may be missing out on their refunds all together," Villanueva said.

The IRS said students and low income workers are two major groups that sometimes don't file because they don't think they need to.

"If you were a student with a summer job and you didn't necessarily make enough money to have to file a tax return, but if you had money withholding, you might actually have a refund coming back," Clay Sanford IRS spokesperson said.

Failure to file a return also makes you ineligible for several tax credits. The IRS estimates that one in four people don't take advantage of the earned income tax credit that was worth up to $6,000 in 2013.

"There's a lot of things [...] credits, especially credits and deductions that you have to put on your tax return that could mean an even bigger refund," Sanford said.

Money that is not claimed this year from 2013 refunds become property of the U.S. Treasury.

If you're not sure if you qualify for a 2013 refund, the IRS recommends you read Publication 17 on their website It has the most updated information and can be a great resource. You can find that publication here.

If you make less than $64,000 you can also use this free federal service to find out what deductions and credits may apply to you.