Arnold Tobias Gervais, 34, pleaded guilty in U.S. District Court Wednesday to filing the false claims, The Atlanta Journal-Constitution reported.
Prosecutors said Gervais filed claims for refunds of more than $3.4 million and was able to persuade the IRS into giving him $2.8 million.
The IRS was able to recover $2.2 million from Gervais' accounts.
Gervais served time in prison in 2009 for having his wife file a fake income tax refund claim for more than $800,000. He also filed fraudulent returns for 2004, 2005, 2006, 2007 and 2009, prosecutors said.
The refund claims were for false wages and federal tax withholdings from a fake company called "Safety Shoes & More Inc.," that was based out of Rome, Ga.
Gervais now faces up to five years in federal prison and a fine of up to $250,000. He is scheduled to be sentenced on March 28.