If your antidepressant is working fine, no need to taper.
However, if you're wanting to taper, per Harvard health:
https://www.health.harvard.edu/diseases ... depressant
"two to six weeks or longer between dose reductions"
"If you experience discontinuation symptoms after a particular dose reduction, you may want to add back half the dose — or all of it — and continue from there with smaller dose reductions. There are no hard and fast rules for getting off antidepressants, other than that the approach should be individualized!"
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And this seems like good, middle-of-the-road advice to me. 