S. 37(1) : Business expenditure – Method of accounting – Entries in the books of account cannot decide whether a receipt is taxable or not or whether expenses are allowable as deduction or not – Courts are compelled to go by the true nature of the receipts and not go by the entries in the books of account – Once a liability to pay has accrued during the assessment year deduction can be allowed even though it had to be discharged at a future date – Even if the assessee disputes the liability to pay sales tax by filing an appeal, once the demand for payment has been received, the said amount can be claimed as a deduction. [ S. 28(1), 37(1) , 145, Indian Income-tax Act, 1922, S. 10(2)(xv)]