If you have seriously delinquent tax debt, IRC § 7345 authorizes the IRS to certify that debt to the State Department for action. The State Department generally will not issue a passport to you after receiving certification from the IRS.
Upon receiving certification, the State Department shall deny your passport application and/or may revoke your current passport. If your passport application is denied or your passport revoked and you are overseas, the State Department may issue you a limited validity passport good only for direct return to the United States.
Seriously delinquent tax debt is an individual's unpaid, legally enforceable federal tax debt totaling more than $50,000 (including interest and penalties).