Obama tells Univision that candidates should "let people know who we are" and "what we stand for."
The president says the act of releasing tax returns is "just carrying on a tradition that has existed throughout the modern presidency."
Obama has released tax returns for last year, showing that he paid more than $160,000 in federal taxes on nearly $790,000 in income. Obama's campaign has released tax information going back to 2000 and pressured Romney to release past records.
Romney's campaign projects he will pay $6.2 million in taxes on $45 million in income in 2010 and 2011.
