Apple Inc Chief Executive Tim Cook made no apology on Tuesday for the iPad maker saving billions of dollars in U.S. taxes through Irish subsidiaries and told lawmakers that his company backs corporate tax reform, even though it may end up paying more. The Senate Permanent Subcommittee on Investigations has found that Apple in 2012 alone avoided paying $9 billion in U.S. taxes, using a strategy involving three offshore units with no discernible tax home, or "residence." Cook, in his first congressional testimony since becoming Apple CEO in 2011, said his company is a major taxpayer, handing over nearly $6 billion in cash to the U.S. government in 2012. "We expect to pay even more this year," Cook said. "We pay all the taxes we owe." [Reuters]

The GOP is making a concerted effort to pressure billionaire investment guru Warren Buffett to release his tax returns to the public. Republicans say Buffett — the public face of Obama’s proposed “Buffett rule” to increase taxes on the wealthy — needs to reveal his finances if his views on tax rates are going to serve as the basis for Obama administration policy. “Will Warren Buffett release his tax returns so we can see why he should be the standard for tax policy?” Sen. John Cornyn (R-Texas) questioned in a tweet Thursday. “If he’s going to be the gold standard, so to speak, in terms of what our tax policy should be, yeah, let’s look at it [his tax returns],” Cornyn told ABC News. [