Sen, who was the editor of a magazine brought out by the group, appeared before the Enforcement Directorate office here after being summoned by the agency which is probing the scam.
She was accompanied by her husband Kalyan Roy.
Trinamool Congress leader and West Bengal Textile Minister Shyamapada Mukherjee is also slated to appear before the agency for questioning during the day.
The first state minister to be questioned in the scam, Mukherjee has been summoned regarding the transaction of a plot of land with the Saradha group in 2009.