The TMC delegation comprised MPs Kakoli Ghosh Dastidar, Sushmita Dev, Abir Ranjan Biswas, Pratima Mondal and Dola Sen.
Dev collected the certificate of her election from the Speaker and returning officer during the day, an official in the speaker's office said.
The TMC had last week named Sushmita Dev, who recently joined the party after quitting the Congress, as its candidate for the by-poll.
Dev, a former Congress MP from Silchar, Assam joined TMC last month.
Dev, who was one of the national spokespersons of Congress and its women's wing chief, switched over to the Mamata Banerjee-led camp last month.
The TMC which aims to try and dislodge the ruling BJP-led alliance in the state in the next assembly elections, has been sending large numbers of their top leadership to the state.
She feels her joining the TMC will not come in the way of an alliance between the two parties at the national level as "politics is not about charity".
Trinamool Congress on Tuesday said Sushmita Dev joining the party will not impact Opposition unity and asserted that they do not believe in poaching.
Dev, who was the chief of the women's wing of the Congress, joined the TMC in the presence of senior party leaders Abhishek Banerjee and Derek O'Brien in Kolkata on Monday.
A former MP, Dev was the national spokesperson of the grand old party and the chief of the All India Mahila Congress.
A senior TMC leader said she might meet West Bengal Chief Minister Mamata Banerjee later in the day.
Sibal, a member of the 'Group of 23' leaders who had written to Congress president Sonia Gandhi seeking organisational overhaul, has been demanding that the party be strengthened.
Dev, a former MP who has been heading the Congress' women's wing for long, offered no reason for her quitting the party.
The Congress has earlier accused the social media giant of acting against Rahul Gandhi's account under pressure from the government.
The Central government which failed in dealing with the pandemic effectively also failed to control the prices of essentials making the public suffer more, Mahila Congress chief Sushmita Dev said.