Can I go for IIT  preparation as well along with my CBSE board exam preparation in year 2020 ??

I gave my 12 th board exam  in year 2018 but failed then I decided to give improvement exam for it as a private candidate, again for the next time  to year 2019 but think that will fail again  and if so then should I go for improvement exam again as a private student in year 2020 ???  Should I need to reappear for my practical exam again??? Can I do IIT exam  preparation  along with my 12th board preparation for year 2020 ??
PLEASE ANSWER IT..

I suggest you, do not lose hope. Keep preparing for what you want. Work hard for both the things. Be consistent.You will be selected definitely. Any other query you can ask me.

And if you are writing as a private student then you have to give practical exams again.

Thanks bro..but what do consecutive years mean?? It is said that you have only 2 consecutive years after class 12th for IIT exam preparation..! What do it mean I have already done 2 times with my board but unfortunately failed to succeed ,so do it make any other chance to appear in 2020 IIT JEE examination going to be held in the month of January along with CBSE board preparation for improvement exam as a private candidate ??????

Am I eligible to sit in  IIT JEE exam going to held in 2020 ??

If so then this time my target is to secure 95+% in boards as well as under  top 1000 in JEE  advance ranking...but confused about the eligibility for sitting in IIT JEE exam if it is 2nd time failure in boards with overall no attempts for IIT !!!

Please help me to out of this all above written confusions .....

As I already failed for twice ..I don't want it to repeat

Ashutosh Rai Bro i am in exact same situation please reply what happened