New York (CNN Business) The IRS is auditing Uber's 2013 and 2014 tax bills, the company said in a filing Tuesday.

Uber's UBER taxes are also under investigation by various state and foreign tax authorities.

Uber also said a decade's worth of its taxes remain open across multiple jurisdictions, including the United States, United Kingdom, Brazil, Mexico, Australia, Singapore, Australia, India and the Netherlands. Those countries have not yet signed off on their tax bills from 2010, when Uber offered its first ride, through 2019.

Although Uber says it believes it has sufficient money set aside for any additional tax liability it could face, Uber acknowledged the timing of the resolution "is highly uncertain."

The company did not have any comment beyond the filing. It did make the disclosure about the audits, which it termed an "examination," in the filings it made ahead of its recent initial public offering

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