When will i start.ovulating after a polyp was removed ?

At the usual time: Removing a polyp shouldn't affect the ovarian cycle. The polyp is an overgrowth inside your uterus. You should ovulate at the same time. That said, stress (like having surgery) can push back ovulation a week or two.

Anytime: A polyp in the uterus has no impact on ovulation. If you were ovulating regularly before the surgery you should continue on schedule. If you were put on birth control pills prior to the surgery it may take 3-6 weeks to ovulate after you stop the pills. If your cycles were irregular before you may need ovulation stimulation medicine like clomid (clomiphene).