How do I add my name to the deed to our house that is currently only in my wife's name?

At the top of the Real Estate Law forum there is a sticky post that explains how to add someone to a deed. You can read it at https://www.askmehelpdesk.com/real-estate-law/how-add-someone-your-deed-91136.html

How do I add my name to the deed to our house that is currently only in my wifes name?

https://www.askmehelpdesk.com/real-estate-law/how-add-someone-your-deed-91136.html

Get her to sign a deed to both of you.

Joint tenancy with the right of survivorship would be one alternative. Default is Tenancy in common in most states.