Rule – 9, Royalties or copyright fees, etc., for literary or artistic work

9. (1) Where a claim for an allocation is or has been made under section 12AA of the Indian Income-tax Act, 1922 (11 of 1922), in respect of the amount referred to in that section, it shall be dealt with in the following manner, namely:—

(i) where the time taken by the author of the literary or artistic work in the making thereof is more than twelve but less than twenty-four months, one-half of the amount referred to in the said section shall be included in the total income of the previous year in which the whole amount is received or receivable, and the other half in the total income of the next succeeding previous year; and
(ii) where the time so taken is twenty-four months or more, one-third of the amount referred to in the said section shall be included in the total income of the previous year in which the whole amount is received or receivable and one-third of the said amount in the total income of each of the two next succeeding previous years.

²²(2) Where a claim for an allocation is made by an assessee under section 180²³ for the assessment year 1962-63 or any subsequent assessment year, it shall be dealt with in the following manner, namely:—

(i) the tax for the assessment year relevant to the previous year in which the whole amount is received or receivable shall be—

(a) the amount of tax payable on the total income as reduced by two-thirds of the amount referred to in section 180 included in the total income of the previous year aforesaid had the total income so reduced been his total income; plus
(b) the tax on an amount equal to two-thirds of the amount referred to in section 180 included in the total income of the previous year aforesaid at the rate applicable to a total income of an amount equal to one-third of such inclusion; and

(ii) one-third of the amount referred to in section 180 included in the total income of the previous year aforesaid shall be included in the total income of each of the two next succeeding previous years and the tax payable, if any, in respect of each of the assessments relevant to the two said succeeding previous years shall be reduced by an amount equal to one-half of the tax referred to in sub-clause (b) of clause (i).

Reference: www.incometaxindia.gov.in