My return was rejected because the IRS doesn't recognized the EIN of my employers. But the numbers entered match my w-2's. I don't know why?

If the EIN has been correctly entered into the software, either

• Contact your employer to see whether the W-2 was prepared correctly, or
• Check one of your 2023 paystubs which may have the EIN number included on them.

Is the employer a startup company?

Maybe they only recently applied for their FEIN and it isn't in the IRS e-file computers yet.

Ask the employer to confirm those FEIN numbers(s) with what's on your W-2...could have been mistyped on their end...unless they've been reported the same way for years now.