A top Senate Democrat’s proposal to limit future deductions for companies that moved tax addresses out of the U.S. as many as 20 years ago would penalize dozens of so-called inversion deals, Bloomberg News reported yesterday. The proposal by Charles Schumer of New York, the No. 3 leader in the Senate’s Democratic majority, would reduce the amount of deductible interest for inverted companies to 25 percent of U.S. taxable income from 50 percent, according to a draft obtained by Bloomberg News. President Barack Obama has included a similar provision in his annual budgets, and this is the first time the language made it into a legislative proposal, Robert Willens, a New York-based independent consultant on corporate taxes, said yesterday. The proposal isn’t final and is subject to change, said a Schumer aide who asked not to be named while discussing pending legislation. Schumer hasn’t decided when he will introduce it, the aide said.