On May 31, the California Senate passed SB 149 on a party-line vote, 27-13. It requires presidential primary candidates to reveal five years of tax returns. A Republican Senator presented an amendment that would have also required candidates to show their birth certificates, but it was defeated. The bill now goes to the Assembly.
There is nothing in the US Constitution that lists the revealing of tax returns as a required qualification for the office of President of these United States.
Bob is correct.