So, when I first saw this question yesterday, my instinctual reaction was, "nobody lived at Tara." But, as archaeology is not my primary area of research and because I am still quite prone to imposter syndrome, I figured I'd do some digging and see if anyone better qualified than myself were to come along in the mean time.

As no one has, and I have consulted a few different good sources on the topic, I can confirm that my instinctual reaction was pretty well correct: I can find no evidence, archaeological or literary that Tara was ever inhabited.

The general academic consensus, and indeed what I was taught as an undergraduate and the way I have understood the site since, is that Tara was a ceremonial or ritual site, and not one that was ever occupied.

I know sources are technically not required, though I do generally prefer to include them, and I am happy to provide what I have consulted but I'm not quite sure as to what is best to recommend, since none of them really answer your question. So I can certainly provide more archaeological or more literary references, depending on your preference. Just let me know!