Shares bought today but not yet settled and credited to your demat account the next day, are classified as t1 holdings in Zerodha.
In India, the settlement cycle is t+1 day means shares bought today will be credited to your Zerodha demat account next working day (t+1).
In Zerodha, you cannot use the sale proceeds from t1 holdings (before delivery) on the same day. Funds are available for trading on the next trading day.
e.g.
On T day i.e., 14 April, you bought 100 shares at Rs 100, worth Rs 10,000.
On T+1 day i.e., 15 April, you sold shares at Rs 11,000.
100% Funds will be released next day i.e., 16 April.