National Assembly Majority leader Kimani Ichung'wah now wants Treasury CS Njuguna Ndungu to release information about individuals and firms who have benefited from tax waivers.
Speaking in an interview with Citizen TV, Ichung'wah said he has written to the CS and expects feedback in the next 14 days with information from 2018 to date.
"We have a record of tax waivers that have been sent, this is between 2012 and 2017, we now want records from both the handshake regime and President William Ruto's regime," he said.
The Kikuyu MP said his move does not target anyone, adding the push was not meant to settle political fights
"Even if anyone was granted tax waiver under the Kenya Kwanza government, we expect that information to be available," he said.
The President has in recent days maintained that every Kenyan should pay taxes, adding that all citizens agree that there should be no tax waiver.
“I'm happy that as a country, we have built a consensus that irrespective of your status, region or religion there will be no tax waiver for anybody,” he said.
The government's push to have all Kenyans pay taxes has been seen as an attack on Retired President Uhuru Kenyatta and the late President Daniel Moi's families.
On January 30, while speaking in Mombasa, Ruto stated that some people exempted themselves from paying taxes when they were in power.
“The good people who were used to exempting themselves from paying tax, their days are up," Ruto said.
"It doesn’t matter even if they sponsor demonstrations so that they don’t pay tax. I promise them they will pay tax. There is no more exemption."