Do i follow through with the identity verification request the irs sent me in mail regarding my tax refund? I have max benefits through turbotax, who do I talk to first?

The irs suspects that my taxes may have been filed fraudulently, other are requesting verification of my identity, which I don't have an issue providing. I'm just not sure what exactly to do and how to go about doing it. I have the max benefits through turbo tax, do I contact an audit specialist before I talk to the irs?