hi,

see for appearing in tissnet entrance test you need to have a graduation degree or appearing in a graduation degree which is at least of 3 years. the final year candidates in graduation also eligible to allow. but for 10+2+4 years graduation pattern candidates it is mandatory to have clear all courses or subjects till six semester. as you have back log in 6 semester , you are not eligible to apply. you may follow the below link to know in details:

https://bschool.careers360.com/articles/tissnet-mba-eligibility-criteria