People are learning about a new unemployment scam now that is tax time.

Millions of Americans are opening their mail to discover a mysterious 1099-G IRS tax form for unemployment benefits they never applied for, or received.

It's the first notice many are getting that they are victims of a massive identity theft and unemployment fraud scheme. The IRS recently added guidance telling filers not to include the erroneous 1099-G, and to file their taxes as they would otherwise.

Filers should also check their earnings records with Social Security by logging into, or creating a My Social Security account and then checking their statements, at ssa.gov/myaccount. If items need to be corrected, they can call Social Security at 800-772-1213 or contact a local office.