Where can I get Form 10DB at Zerodha?
Form 10DB used to act as evidence of payment of STT (securities transaction tax) for claiming a tax rebate under section 88E of the Income Tax Act.
However, from the Assessment Year 2009-10 & onwards, no rebate is allowed under section 88E as STT was allowed as a business expense for which a deduction could be claimed. For this purpose, you can use the Tax P&L available Console.
Due to this Form 10DB (PDF) has become redundant and no longer necessary.