Such loss can be carried forward for eight years immediately succeeding the year in which the loss is incurred. Hence AY 2011-12 can be adjusted against profit of AY 2019-20.
Loss can be carried forword upto 8 assessment years immediately succeeding the year in which it is occured if it not occured from speculation business. Therefore loss of A.Y 2011-12 can be set off against the profit of AY 2019-20.