Centre has listed the GST bill for discussion in the Rajya Sabha on Wednesday, hoping it will be passed with consensus.
However, Opposition Congress said that consultation is still going on over the issue and an agreement is not yet finalised.
The BJP has issued whip for all its Rajya Sabha members to be present in the house for the next three days.
"The GST bill is listed for Wednesday. We hope it will be passed through consensus," Parliamentary Affairs Minister Ananth Kumar told reporters in national capital.
The NDA government had earlier lanned to take up the Goods and Services Tax bill on Tuesday but chose to delay it by a day so that parties have enough time to talk to their members.
The "mood is in favour of passing the bill", said Ananth Kumar, adding that talks are being held with different political parties as the bill concerns all the states.
Congress said it was ready to accept every reasonable solution but added that the consultation is still going on.
"We are prepared to accept every reasonable solution which does not adversely affect business and industry, and does not adversely affect the federal structure and the consumer at large," Congress spokesman P.L. Punia told reporters.