If there is a income from commission on LIC to a person other then an agent of LIC then it will be taxable U/s Income from other source only as per the provisions of section-56 however if he is an agent of the LIC then it will be taxable U/H business of profession.
if the income is commission on lic then you need to file itr-2 way to enter with taxyogi
choose casual income under the head other sources
if you are an agent then you have to file itr-4