A W-2 form is a tax document that employers use to report wages and taxes withheld to the Internal Revenue Service (IRS). The EIN number is the Employer Identification Number, which is a nine-digit number assigned by the IRS to businesses and other organizations.

The EIN number is located in Box b of the W-2 form. Box b is located in the upper right corner of the form, just below the employee's name and Social Security number.

Here are the steps on how to find the EIN number on a W-2 form:

1. Locate the W-2 form.
2. Find the upper right corner of the form.
3. Look for Box b.
4. The EIN number will be a nine-digit number located in Box b.

Here are some common mistakes to avoid when finding the EIN number on a W-2 form:

• Not looking in the right place. The EIN number is located in Box b, not Box 1.
• Reading the number incorrectly. The EIN number is a nine-digit number, so make sure to read it carefully.
• Confusing the EIN number with the Social Security number. The EIN number is different from the Social Security number.

If you cannot find the EIN number on your W-2 form, you can contact your employer for assistance.