WASHINGTON — As ransomware attacks surge, the FBI is doubling down on its guidance to affected businesses: Don’t pay the cybercriminals. But the U.S. government also offers a little-noticed incentive for those who do pay: The ransoms may be tax deductible. The IRS offers no formal guidance on ransomware payments, but multiple tax experts interviewed by The Associated Press said deductions are usually allowed under law and established guidance. It’s a “silver lining” to ransomware victims, as some tax lawyers and accountants put it. But those looking to discourage payments are less sanguine. They fear the deduction is a potentially problematic incentive that could entice businesses to pay ransoms against the advice of law enforcement. At a minimum, they say, the deductibility sends a discordant message to businesses under duress. “It seems a little incongruous to me,” said Rep. John Katko, the top Republican on the House Committee on Homeland …