"I hope every political party will reconsider and revisit its decision" on not participating in the launch event to be organised in the Central Hall of Parliament, he said.
The government, he said, remains committed to the Goods and Services Tax (GST) as any other reform. "It is single most important taxation reform in 70 years."
All decision on GST, including rules and tax rates, were taken in consultation with states and political parties must display broad shoulder and own up their responsibility, he said.
Trinamool Congress has already announced its decision to boycott the event.
CPI(M) general secretary Sitaram Yechury has already questioned the government on "hurrying" into introducing GST and recalled that the ruling BJP had opposed the system when it was in the opposition.
GST, being billed as the biggest tax reform since Independence, will subsume all indirect state and central levies, making India a single market.
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