Gov. Larry Hogan announced the largest tax refund in Maryland's history on Monday.
Marylanders will be getting back $200 million from the state.
The Supreme Court made a ruling that those who filed taxes in another state between 2011 and 2014 were overcharged.
About 55,000 Marylanders are now owed money by the state.
"The thing is, many of these taxpayers don't even know that they were overcharged and don't know that they're entitled to these refunds," Hogan said.
To find out if the tax refund applies to you, click here.