The IRS maintains a directory of PTIN holders. However, it doesn't include everyone who has a valid PTIN. It only includes PTIN holders who meet one of the following requirements:If your tax preparer isn't in the directory, it doesn't necessarily mean they don't have a PTIN. It just means either they don't hold one of the credentials recognized by the IRS or haven't completed the Annual Filing Season Program.You can always ask your preparer if they have a PTIN.