So I recently brewed an Imperial Stout and I threw 4 lbs of corn sugar in the brew kettle in order to bump up the alcohol by volume. Now, I have never actually done this before but I tasted a small sample of the beer and it tastes delicious but, it also tastes like it has already carbonated due to the 4 lbs of corn sugar. It does not taste flat in any way, it tastes full and carbonated to me. Anyways, my question is. During the bottling process, should I add sugar as usual to carbonate in bottles or will that over carbonate the beer? I don't want to ruin this batch with over carbonation because it's a really tastey beer.