To be honest, I think it's probably fine. I cannot say for sure that "inquiry" is the right word without knowing more about it. I would probably say something like this, but again I do not have all the information: I am currently in the process of submitting an address change request to the ___ office. Until that is officially done, my drivers license(or whatever document you have) will still contain the old address; however, I will let you know when everything is done.