(CNN) - Mitt Romney's campaign said Thursday it would amend a financial disclosure form filed when he officially declared his candidacy in 2011 because some details didn't match the candidate's newly-released income tax returns.
Romney's campaign spokeswoman Andrea Saul said the changes were "of a minor technical nature," and that the overall picture of the disclosure report would not change.
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"The inescapable fact is that by releasing over 600 pages of information regarding his finances, Mitt Romney is clearly coming down on the side of disclosure," Saul said. "Any document with this level of complexity and detail is bound to have a few trivial inadvertent issues."
Reports Thursday pinned one discrepancy on a Swiss bank account held by Mitt and Ann Romney that was recorded in the tax returns, but was missing from the initial disclosure filing.
The Swiss account omitted from the initial report is part of Ann Romney's blind trust, according to the Los Angeles Times. The newspaper reported the couple held $3 million in the account until 2010, when it was closed. The Romney campaign is amending the disclosure report to reflect $1,700 worth on interest earned from the account in 2010, according to the L.A. Times.
The newspaper said there were a total of 23 funds or partnerships that appeared in the tax returns but weren't listed on the disclosure forms.
Candidates for president are required by law to disclose personal finance information to the Federal Election Commission, but aren't required to release their personal income tax returns. However, many past presidential candidates have released their tax forms.
Romney's campaign released the former Massachusetts governor's tax returns Tuesday after pressure from fellow candidates. The forms showed the candidate making $42.7 million over the past two years, and paying $6.2 million in taxes.
While the Romney campaign called the changes "minor" and "technical," the Democratic National Committee chair suggested something more sinister.
"Well, good for him. I would never have assumed it was okay to leave a Swiss bank account off my disclosure," Debbie Wasserman Schultz said on CNN's "The Situation Room," then asked, "What is he trying to hide?"