According to the report, improper payments in the past decade, from 2003 through 2012, totaled up to $132.6 billion dollars, peaking during the 2010 economic crisis at $18.4 billion dollars.

The report says the IRS was unable to show it has taken proper steps to fix the problem after the inspector general flagged it in 2008…

The IRS said it can’t audit all 27 million families who claim the credit. The tax agency added that it prevents $4 billion in improper claims each year and is committed to expanding that.