1.
The principal (owner) is required to file ITC-04. The principal is responsible for discharging GST liability on job-worked goods. The goods may be sent from one job-worker to another job worker.
"4.4 Amended Para 3. of C.B.I. & C. Circular No. 88/07/2019-GST, dated 1-2-2019
It may be noted that the responsibility of keeping proper accounts of the inputs and capital goods sent for job work lies with the principal. Moreover, if the time frame specified under section 143 for bringing back or further supplying the inputs/capital goods is not adhered to, the activity of sending the goods for job work shall be deemed to be a supply by the principal on the day when the said inputs/capital goods were sent out by him. Thus, essentially, sending goods for job work is not a supply as such, but it acquires the character of supply only when the inputs/capital goods sent for job work are neither received back by the principal nor supplied further by the principal from the place of business/premises of the job worker within the specified time period (under section 143) of being sent out. It may be noted that the responsibility for sending the goods for job work as well as bringing them back or supplying them has been cast on the principal."