Dear Amit, MAT score is valid for 1 year from the day the results have been announced. So for you to take admission in MBA in 2020, you should have appeared to MAT in 2019. But to your advantage, MAT is conducted 4 times a year, in February, May, September and December. So you can attend MAT February session in 2020 and your score will be considered for 2020 admissions to MBA.