The conditions prescribed in respect of inputs/ capital goods sent for job work are set out in Rule 45 of the CGST Rules, 2017 ass under:
(a) The inputs, semi-finished goods or capital goods are to be sent to the job worker under the cover of a challan issued by the principal including cases where the inputs, semi-finished goods or capital goods are sent directly to job worker;
(b) The challan issued by the principal should contain the details as specified in Rule 55 of the CGST Rules, 2017
(c) The details of challan in respect of goods dispatched to/ received from a job worker or sent from one job worker to another during a quarter shall be included in Form GST ITC-04 furnished for that period on or before the 25th day of the month succeeding the said quarter.
(d) If the inputs/ capital goods are not returned within the 1 year/ 3 years,
respectively, it shall be deemed that such inputs or capital goods had been supplied by the principal to the job worker on the day when the said inputs or
capital goods were sent out and the said supply shall be declared in FORM GSTR-1. Further, the principal shall be liable to pay the tax along with applicable interest.
(ICAI FAQ PUBLICATIONS 06-09-2017 INPUT TAX CREDIT: FAQ NO. 63)