SACRAMENTO, Calif -- SACRAMENTO, Calif. - Many same-sex couples are getting a tax break this year from the IRS, according to new requirements to report their combined income on federal tax returns. Under "income splitting," the IRS is requiring all same-sex married couples or registered domestic partners in Washington state, California and Nevada to divide their combined income equally and report it on their separate tax returns. For some couples, it will mean more money in their 2010 refund; for others, they'll pay more in taxes. Either way, the change is significant, both monetarily and emotionally, officials of Lambda Legal,...