hello,

TISS MAT is a common entrance examination conducted by the Tata Institute of Social Sciences. Candidates who are looking for admission to MA in Human Resource Management & Labor Relations (HRM &LR) or MA in Organization Development, Change and Leadership (ODCL) courses need to appear for TISS MAT examination after TISSNET. TISSNET assesses the social aptitude of the participant whereas TISSMAT has been introduced to evaluate business aptitude of the participant.  In 2021 TISSNET will be conducted on February 20 and the dates of TISSMAT is still not announced but it is expected that the TISSMAT exam date will be in the month of March or April. so, you don't have to write the TISSMAT immediately after the TISSNET. There will be enough time between the exams possibly a month.

For more information check the link below

https://university.careers360.com/articles/tissnet

Good luck!