San Franciscoâofficially known as the City and County of San Franciscoâis a consolidated city-county, a status it has held since the 1856 secession of what is now San Mateo County. It is the only such consolidation in California.
Under New York's Tax Law, there is generally a three-year statute of limitations on tax audits, though in some cases (such as when fraud exists or when a substantial understatement has been made on an income tax return), the statute of limitations can last for as long as six years.
Save your tax returns and supporting documents for at least three years. That's how long the IRS has to audit you. There are, however, exceptions. The IRS has up to six years to audit you if you under-report your income by 25% or more. There is no statute of limitations on audits of fraudulent returns.