Class 12-Commerce

That not necessary because government college for example DU or other many universities go for best 4 aggregate marks.

You can go for event management course. That not only offer wedding but some other events also as in birthday parts, kitty parts, family get together. So, that will be better. First, go for small events, gain experience than only the client gave you opportunity for the big event as in wedding.
Best of luck.

Of course, you can opt that field as it's really in high demand in this era. You can do a short term course for game designing as in MAAC (Maya academy of advanced cinematics) or Arena Animation. Or you can go for BCA for programming.

According to the website of Indian Nursing Council, 10+2 Science stream Biology group (PCB) passed students are the most preferred ones. However, it has also been mentioned that 10+2 Arts stream passed students are also eligible to pursue this course. Minimum aggregate marks required may vary from one institute to another. Usually, it is around 40-50% marks. You can check it in the official link:
http://www.indiannursingcouncil.org/nursing-programs.asp?show=elig-crit

Popular Courses After 12th for Commerce Students are mentioned below:
https://www.shiksha.com/courses-after-12th/commerce.

Hi, As I see your interest for Income Tax Department I suggest you to pursue your degree in B.Com which gives you ideas about the accounting, taxations and various other things which will help you for the future papers you give and will put an insight to what your goals are about. All the best.

Commerce with maths is a good combination for pursuing CA, provided you want to get into that tough course.
If you have an interest in maths and you get it well, you can also go for CAT exam.

There are many options depending upon your area of interest like CS CA CMA, B.Com BBA BCA etc. B.Com is better than BCA. A combination of Company Secretaryship CS course and Bachelor in Commerce B.Com is much appreciated. So, after 12th you may enroll yourself in the CS foundation course online on the official ICSI website (www.icsi.edu) and simultaneously you may go for B.Com from any recognised university.

There is no comparison of Chartered Accountant CA Course and BCA and BBA course. CA course is more tough, complex and reputed than a normal average BCA course. If you are seriously committed to your career and studies, then I suggest you to go for CA and if not then go for BCA.

B.Com is better and you seem to have decent %. Definitely, go for it.