Hi Christine,
Going by a certain timeframe to stop meds isn't a good idea since we're all different. It's important to determine that you're in remission before stopping meds. There are two ways to do this:
The easiest is to look at your TSH level after being on a low dose of meds (1.25 mg daily) for more than 6 weeks. If you're secreting TSH normally you're likely in remission. You can then wean further by taking the 1.25 mg dose every other day and having labs after 6 weeks on this dose before stopping meds completely.
Alternately, you can have a TSI level. If it's lower than around 70% activity you should be able to stop meds. Symptoms usually occur when TSI is at 125% activity. Looking at TSH works because TSI antibodies falsely decrease the TSH level. If on a very tiny dose you're secreting TSH normally, this shows that your TSI levels are low. Best, Elaine