Opening balance for capital and cash on hand

sales turnover year :2018-2019 rs. 69 lacs
sales turnover year: 2019-2020 rs.80 lacs.
Assess income tax returns filed two years.books of accounting not maintained.
doubt:
Assess How much amount (minimum and maximum) capital and cash on hand and closing stock introduced opening balance as on 01-04-2018 i.t.return shown in balance sheet under I.t. act.