A constitutional amendment to ban an income tax in Tennessee passed the House yesterday.By a 73-17 vote, the House approved the bill, which passed last year in the Senate. However, it still has two more hurdles to clear.The measure must now be approved by a two-thirds vote of both chambers in the next General Assembly. If that happens it will then be placed on the ballot in 2014.“I have a little bit of a problem with saying you’re never, ever going to do something because we don’t know what the future holds,” said state Rep. Charles Curtiss, who voted against the income tax ban.