(1) A self-employed contributor to whom article 20A applies shall furnish to the Minister, within 9 months of the end of a contribution year or from the day in a contribution year in which he or she ceases to be such a contributor a return, in a form approved by the Minister, showing in respect of that contribution year -

(a) the total reackonable income or reckonable emoluments, as the case may be,

(b) the total self-employment contributions,

(c) the dates of commencement and cessation of insurable self-employment.

(2) The self-employed contributor shall keep a copy of the return made under sub-article (1) and it shall be retained for six years after the end of the contribution year to which it refers.