For a kit wine, 6 months in the bottle should be enough for an enjoyable quaff, though longer is better (up to a point, unless you added some additional stabilizer at bottling).
What type of kit did you use? Aside from a bit of a disaster with a crushendo kit which I won't use again (ironically, also a Brunello), I've had good results with the WineXpert Selection series (Estate, Ltd, International).
Atomic Dog Brewery
On Deck: Centennial IPA, Dry Irish Stout
P: Cascade Pale Ale
T: Carbed Crystal Light, Root Beer, Vanilla Cream Soda, Tripel IPA, Apfelwein
e^(pi*i) + 1 = 0