There is a new section called 115BAC intserted in Income Tax, 1961. This is going to effect from AY 2021-22. An assessee can opt old system or new as he wish. When an assesse opting for New he will lose some exemptions/deductions/carry forwad loss etc
LIVE Course on GSTR-9 & GSTR-9C (Technical | Practical | Concept - Based)