Home Loan approval - anyone went through the process?

So I recently got approved for a home loan. The underwriters are asking for an explanation on my 'SSN' i used before DACA.

I don't really know what to say? Has anyone ever had to explain our prior situation to get approved for the home loan?

Any input is appreciated. Thanks!

I actually bought a house back in April 2015, but no one ever asked me about a prior social, all I used was the social appointed to me thought my ead, I said nothing about a prior number, did you?