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.
An open tax year relates to any tax year for which a taxpayer has filed a tax return that can still be questioned by federal or state income tax authorities. The IRS generally has 3 years (statute of limitations), from the date of filing, to audit your income tax return. However, once the audit door is open, if the IRS determines that you underreported your income by 25% or more they can go back 6 (six) years.