(1) Every employer registered under this Act shall furnish to the prescribed authority a return in such form, for such periods and by such dates as may be prescribed, showing therein the salaries and wages paid by him and the amount of tax deducted by him in respect thereof.

Provided that, the Commissioner may, subject to such terms and conditions, as may be prescribed, permit any employer to file separate returns,-

(a) for all or any of the places of business of the employer, whether or not situated within the jurisdiction of the same registering authority, or

(b) for different constituents of his business,

to such authority as he may direct.

(2) Every such return shall be accompanied by a treasury challan in proof of payment of full amount of tax due according to the return, and a return without such proof of payment shall not be deemed to have been duly filed.

(3) Where an employer has without reasonable cause failed to file such return within the required time, the prescribed authority may, after giving him a reasonable opportunity of being heard, impose upon him a penalty of rupees three hundred per return.