SAT name change after test

I already took the SAT. It wasn’t until I began applying to colleges that I realized the name I registered for the SAT only included one of my last names but all my other legal documents have my two last names. I was told this would cause a problem when sending in scores, so I contacted collegeboard and they told me I need to send two forms of identification to their email so they can make the change. I can’t send in my ID since it has only one of my last names, what do I send in? Will this work? How long will this Change take?
Thanks in advance.

@jemrno My brother who’s applying this year has the same problem! Did you find out any details??