This is a very difficult question to answer with any certainty as it depends on many factors including the amount of alcohol consumed, how frequently, and how affected the liver is (as measured by blood tests checking the level of liver enzymes).
If you can clarify:
What do you mean by the liver "returning to normal?"
Are you speaking of chronic alcohol use?
At this point your liver enzymes should be completely normal and your liver should be working normally.
Remember that liver enzymes can be quite variable. They can increase due to alcohol use, when medications (prescription or over-the-counter) are taken, and when hepatitis is present.
I would, of course, that you continue to abstain from alcohol use. However, if you do resume using alcohol please do so only in moderation. The risk of developing liver cirrhosis (which is permanent) is just not worth it.
Take care and good luck,