The U.S. Senate’s Permanent Subcommittee on Investigations claims Apple has avoided paying billions of dollars in U.S. income taxes by using offshore entities. “Apple wasn’t satisfied with shifting its profits to a low-tax offshore tax haven,” subcommittee chairman Carl Levin (D-Mich.) said in a statement. “Apple sought the Holy Grail of tax avoidance. It has created offshore entities holding tens of billions of dollars,…