T1 indicates that your shares are awaiting settlement and have not yet been credited to your demat account.
How rolling settlement works
Indian stock exchanges use the rolling settlement method. Rolling settlement settles security trades on successive dates so that trades you execute today will have a settlement date on the next trading day. This differs from account settlement, where all trades are settled once in a set period of days, regardless of when the trade occurred.
Settlement timeline
In India, the settlement time for equity is T+1 days. This means if you purchase shares on Monday, they will be added to your demat account by Tuesday evening.
Until your shares are credited, they will be displayed as T1 quantity, showing that the settlement has not yet been completed.