I earned salary from Mar2019 till Aug2019 on company payroll. Further I was extended on contract from Sept2019 till Mar2020. I filed the ITR on 12 Dec 2020, before due date for AY20-21. I got notice of defective return on 18Feb2021 and I filed revised ITR on 3Mar2021 and paid additional tax on contractual income under 44ADA-presumptive. However, the interest are shown now under 234A, 234B and 234C.
If I filed before due date why 234A?
How/fromwhen 234B and C comes into picture?