Assessee is declaring income under section 44AD and he sold out all his business. Now wheter that income is taxable under capital gain or business income?
To tax under capital gains head for slump sale, there is only requirement of Net worth i.e Aggregate value of total assets minus value of liabilities. So, the amount at which business is sold less Net worth will arrive at Capital Gains. And, thereafter capital gains will be charged on the basis of period of holding of business. Why you are getting confuse with the maintenance of books of accounts as we can find the value of given assets and liabilities from market value.