Not for that reason. An EIN has nothing to do with whether you efiled or not.
An EIN is an "Employer Identification Number". It is a 9-digit tax ID number usually in this format: ##-#######.
It's used by businesses, employers, etc. to report payments to you. Or if you are a business owner/employer, to report payments to your employees or contractors.
If you receive a W-2 or 1099-MISC or other tax forms, it likely has an EIN number of the employer or company that paid you.
Why are you asking? Do you have a small business and are wondering if you need to apply for an EIN?
