MAT May registration has started from the third week of February, 2018. To apply for the exam you can go through with the given below link.

MAT Application form 2018

Hello,

MAT 2018 May exam registration for paper based test begins on February 26. The last date to register and apply for May Mat 2018 is April 28. Candidates should register online to appear in MAT May 2018 exam with effect from February 26.  The registration application fee for MAT 2018 exam is Rs 1550/- (Including GST) for Paper Based or computer based MAT exam. If you wish to appear both in paper based and computer based MAT in May 2018, you should pay Rs.2650/- towards application fee.

Good luck!