If you manage your deceased father's profile here, and also manage his DNA results, you should be able to add his test info to his profile.
While on his profile, use the drop down for his profile ID and choose DNA. Then choose the DNA Tests tab. There will be a yellow box warning you that you're attempting to add DNA results for someone other than yourself. Assuming that's what you want to do, click on the Select DNA Test box, choose the particular test, and add his test info. Once completed, within 24 hours his DNA test info will propagate to the pertinent related profiles, based on test type.