Hi Cheryl,
If your husband is living - if he wants to share his DNA test info here, he will need to join WikiTree at least as Family Member (agreeing to WikiTree's Privacy Policy and Terms of Service) and add his own DNA test info to his profile. You can add his email address to his profile and invite him to join. You can also be a manager of his profile, if he desires.
If your husband is deceased, and if you manage his DNA test info and his WikiTree profile, you can add his DNA test info to his profile.
See the DNA FAQ.