Stt on liquidbee

yesterday i sold 30quantity liuidbee and bought 20qt hdfcamc, it was said =
stt is not charged on buy shares cnc,
stt is not charged in liquidbee sell=
then why in my contract note=security transaction tax=22rs is deducted?
can anyone explain

STT will not be charged for Liquidbees, but it will be charged for equities, be it intraday or delivery (cnc). Only brokerage is not applicable in CNC.

You can check Zerodha brokerage calculator