Will Pope Leo XIV have to file and pay U.S. taxes, despite his strict vow of poverty?Leo is the first American pontiff in history. And U.S. citizens, no matter where they live or who they are, are required to pay tax on their worldwide income—if they owe any.  Even if they don’t owe tax, they may have to file a return with the Internal Revenue Service. And whether it’s the pope or the rest of us, there are good reasons to file despite not needing to. This year, the filing threshold is $17,000 of gross income for a single taxpayer who, like Leo, is age 65 or older.