(CNN) - Mitt Romney's campaign said Monday they would not release any more of the candidate's personal income tax information, despite an acknowledgement from Romney that he had been audited in the past.
"Mitt Romney has paid his taxes in full compliance with U.S. Law, and he has paid 100 percent of what he has owed," Romney spokesman Ryan Williams wrote.
Williams later told CNN that "The audit did not result in a fine or penalty."
In his original statement, Williams added, "As has previously been reported, in 2011, the Romneys will pay more than $3.2 million in taxes on $20.9 million in mostly investment income and will have donated more than $4 million to charity. In 2010, The Romneys paid more than $3 million in taxes on $21.6 million in mostly investment income and donated nearly $3 million to charity."
Romney has disclosed his income tax returns from 2010, and released an estimate of his 2011 tax information in April. He has vowed to release 2011's full return one it's completed by his accountant.
Democrats and some Republicans have called on Romney to release more information, saying voters are entitled to know more about a presidential candidate's financial history.
Obama campaign spokeswoman Lis Smith repeated the call in a statement on Monday.
"It's not surprising that Mitt Romney – the most secretive nominee in recent history – is once again siding against transparency and breaking his promise to 'go back and look' at additional tax returns to see if he ever paid less than his 2010 rate of 13.9%," she said. "His refusal to do so raises serious questions about just how much he has paid in taxes and whether he has resorted to tax loopholes and dodges to avoid paying his fair share.
"He can put these questions to rest by following decades of precedent by releasing additional years worth of returns and providing the full account of the income tax rates he paid, as he promised he would just days ago," Smith continued.
Romney and his campaign argue they have met all the legal requirements for tax disclosure, and claim Democrats are waging a war on wealth by demanding more information.
On Monday, Romney said he was confident that the taxes he's paid in the past were all perfectly legal.
"My view is I've paid all the taxes required by law," Romney said on ABC News. "From time to time I've been audited, as happens I think to other citizens as well, and the accounting firm which prepares my taxes has done a very thorough and complete job [to] pay taxes as legally due."
According to an Internal Revenue Service report, nearly 1.6 million audits were conducted in 2010 out of roughly 143,000,000 individual returns filed. That's an audit rate of 1.1%.
Wealthy individuals, however, were subject to a much higher rate – 12.5% for people making more than $1 million in 2011. That was a jump from 8% in 2010 and 6% in 2009.
That spike is partly due to the creation of the IRS's Global High Wealth Industry Group, a division that examines the tax filings of those with incomes or assets of $10 million or more.
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