When to place a withdrawal request after a sell order is executed?

Settlement TAT for trades executed in the equity segment and in F&O is T+1 (Trade Day + 1 working day). 

Instant credit will be provided only against settled quantity which are FREE in your DP holding and not on total holding quantity. 

Instant credit cannot be withdrawn for the sale proceeds on the same day, however for BTST trades, 100% of the sale proceeds will be credited on the next trading day only. 

Note: Withdrawal request may get delayed in case of bank/trade settlement holiday