Hi Alok,

ICSI keeps the register portal live for students who want to apply for CS.

The last date to register for CS foundation 2020 for December session is due for March 31, 2020. While for June 2021, the last date for CS foundation registration 2020 is september 30. The validity of CS form Register is 3 years. To know more steps CS registration you can refer the link below:- https://finance.careers360.com/articles/cs-foundation-admit-card

Admission dates for BBA are different for diffrent diffrent colleges.  You can mention the college which you want to go for.

Thank you:)