TDS under GST: deductors must file Form GSTR 7 timely and deposit deducted tax through the electronic cash ledger. TDS under GST requires registered deductors to file Form GSTR 7 electronically (online or via offline file upload with signature validation), deposit tax by challan credited to the electronic cash ledger, and discharge liabilities by debiting that ledger. Deductors must furnish a system generated Form GSTR 7A to the deductee within five days of crediting the deducted amount to the government; deductees may claim credit in their electronic cash ledger. Form GSTR 7 must be filed by the tenth day of the month succeeding the month of deduction.