I was pre approved for the tax advance. I noticed I had transposed two numbers on my W-2 so I went back and fixed those today, now I'm not approved for the loan?

When you are able to file your tax return there will be a question on how you want to receive your refund.   You will chose the refund advance option.  That option is not yet available and will be there sometime in January.

I am curious about the W-2 you say you entered----employers have until January 31 to issue W-2's for 2024---did your employer somehow issue a W-2 to you before 2024 has even ended---or are you using a pay stub?