Hi, The computation of total income can be obtained from your past employer. It is essentially a statement showing all your earnings and allowances earned, investment proof declared, and income tax deducted. Money received from your parents or friends will not be considered as part of the total earnings as far as the new employer is concerned. However, if you have received a large sum of money from your parents or acquaintances through a bank transaction, then you will need to calculate and pay additional income tax at the time of filing, apart from what the employer has already deducted.