Dear priyanka,

You need to visit the mu website and fill the Online application 2019-20( Not yet come but once mhcet results are out it will be available)

Site: mu.ac.in/portal/

In the application form you need to give a list of colleges you are interested to take admission in. According to your mhcet marks or jee or hsc you would be alloted a specific college. 

If you wish to take admission in some specific college you would rather fill the institute quota forms available or opt for management quota. But getting admission through management quota charge hefty fees and depends  from college to college and stream you are talking about. Also this is with respect to a science student. If you belong to commerce or arts you need to visit the above site for more information.

Hope this helps.

All the best!