Trinamool Congress, a former ally of UPA, will move a no-confidence motion against the UPA government on Wednesday when Parliament meets for the winter session.
Party sources said the motion would be tabled just before the sitting on the first day of the session of the House.
Party Chief Mamata Banerjee has directed all the party MPs, except Kabir Suman who is considered a rebel, to be present in the Lok Sabha tomorrow, sources said.
Trinamool Congress has 19 members in the Lok Sabha.
Strongly opposing FDI in retail sector, Banerjee has remained adament in moving the no-confidence motion despite being isolated by the opposition parties over it.
She had said yesterday that she has no hesitation in supporting even a no-trust motion moved by Left parties.
"If necessary, I am even prepared to go to the CPI-M state party headquarters in Alimuddin Street and talk to its secretary Biman Bose," she had told reporters in Kolkata.