CNET: Yahoo plans to proceed with a spinoff of its stake in Chinese e-commerce giant Alibaba, even if the Internal Revenue Service doesn’t grant it tax-free status. The Internet company said in a regulatory filing that its board decided to go ahead with the plan to spin off its 15 percent stake in Alibaba. Yahoo’s decision comes nearly three weeks after the IRS, “in the exercise of its discretion,” declined to rule on the tax-free status of the spinoff.