Internal Revenue Service Form 8332, Release Revocation of Claim to Exemption for Child by Custodial Parent, is available at IRS.gov. Order the form by clicking the Order Forms & Pubs link on the left of the Forms & Publications page.
The Forms and Publications by U.S. Mail link directs users to the order page, as the website notes. The Internal Revenue Service mails two copies of each requested form. As of 2015, you can also place a form order by telephone by calling 800-829-3676. Form 8332 is also available to download and print by searching for it on the Forms & Publications page via the Current or Prior Year tab.