Procter & Gamble Co.  is suing the U.S. government for nearly $435 million. P&G says the government owes it that amount in taxes and interest after it was “erroneously and illegally assessed” in an IRS audit. The IRS had billed P&G in June after an audit of returns for its 2001-2005 tax years, the lawsuit states. P&G says it paid the additional taxes and interest the IRS claimed were owed, but is suing to get the money back. The dispute stems over credits and d...