Does anyone know how to change the pre-filled name on tax forms?

ZeroChaos80

Hi, I am trying to fill out my W-9 for a job and there is a time limit on getting turned in. I filled the paper work out and noticed that they didn't have my entire last name correct. It's hyphenated and they didn't add the hyphen or the part before the hyphen. When I filled in the info, I added it after my middle name in the blank as that was the proper order anyway but for some reason it won't let me submit the form. Says my signature must match the way my name is listed on part 1. It does match as I deleted and re-typed it. I can only guess the middle name thing is causing the issue. Does anybody know how to fix it?