As you have asked about the process to change the centre for the Indian Institute of Foreign trade (IIFT) exam, I am giving you details about it, check below for that

Change of Examination Centre

You have to be extra careful while choosing the centre for the exam.
But if you need to change the test centre, then such candidates will have to pay the fees of Rs. 500/- via DD drawn in favour of “Indian Institute of Foreign Trade (payable at Delhi) for changing the opted Test Centre.
Application fee for the IIFT:

For General/OBC candidates – Rs. 1550/-
For SC/ST/PH candidates – Rs. 775/-
For Foreign National/NRI/Children of NRI candidates – US$80 (INR Rs. 4500)

Important Events & Dates

Event Date (Tentative)
Notification and application form to be released in Mid of July 2016
Last date to fill & submit online application form 1st week of September 2016
Last date for obtaining application form through post 3rd week of August 2016
Last date of purchasing application form from IIFT office 1st week of September 2016
Last date of submitting duly filled-in form at IIFT office 1st week of September 2016
Last date for obtaining and submitting application form for Foreign Nationals/NRIs/Children of NRIs 3rd week of February 2017
Admit Card to be sent by post in 1st week of November 2016
Admit Card to be uploaded online for downloading 2nd week of November 2016
Written Exam of IIFT 2017 to be held in 4th week of November 2016
Result to be declared in Mid of December 2016