Hello.

If you have not yet booked your slot for MET 2021 Phase I examination, you can appear for the Phase II examination without any additional payment. Once the slot booking for Phase II opens, you can book the slot. If you have already booked your slot for the Phase I examination but do not wish to appear, you have to pay an additional amount of INR 1400 for the second phase.

For more information: https://manipal.edu/mu/admission/indian-students/online-entrance-exam-overview/centres.html

I hope this helps.