TNA MP M.A. Sumanthiran says the agenda is expected to be received by this week.
India had invited the TNA for talks after the Indian government had discussions with Sri Lankan President Mahinda Rajapaksa recently.
The TNA is expected to discuss about a political solution for the Tamils as well as other related issues.
However Sumanthiran said that the exact topics will be known only once the Indian High Commission in Colombo hands over the agenda for the scheduled discussions.
The TNA is to travel to India for talks on October 10, Sumanthiran said.