Income-tax returns: Taxpayers filing their returns with the ITR-4 or Sahaj online form need to submit the following documents as proof in order to claim deductions under Sections 80C, 80D, 80U, 80E, and 80GG, among others. Income-tax returns: Taxpayers filing their returns with the ITR-4 or Sahaj online form need to submit the following documents as proof in order to claim deductions under Sections 80C, 80D, 80U, 80E, and 80GG, among others. by Soban News (international And National News)