My employers EIN is 1 character too long for the website, so it keeps automatically deleting the last character which is making it check as invalid. How can I Fix this?

M empoyers EIN on my W2 has the letter C at the end of it, which is not only not allowed on the website in and of itself, it also makes the EIN 1 character too long for the website. This is causing an enormous headache for me - I'm completely ready to file and even paid the fees already and I can't move forward now.