Donald J. Trump said Friday that he doesn’t believe voters have a right to see his tax returns, and insisted it’s “none of your business” when pressed on what tax rate he himself pays — a question that tripped up Mitt Romney in the 2012 presidential race.

Mr. Trump made the comments in an interview on ABC’s “Good Morning America,” as he continued to try to answer questions about his change in explanations over the last year about why he won’t release the taxes.