hi,

see due to year gap you might face issues to take admission in any of the reguar course. to tell the truth since you did not have completed bba your first year or any of the semester mark sheets have no value. however now you have only option to go for open university or institute with lower ranks. colleges under university of calcutta has no year  gap provision, but from academic score some 5% of marks deducted for each of year gaping. like you have passed hs on  2018 and applied for 2020 admission, your 10% marks of h.s would deducted.

you may look for   ignou, rabindra bharati university as well.