The form states under penalty of perjury a candidate is unaware of any tax delinquency.
Franklin signed the form May 22.
On Wednesday, the 41 Action News Investigators found Jackson County records showing Franklin is late on 2017 taxes for two properties he owns in Independence.
"The documents that you sign, you are responsible for, so it's concerning," McDonald said.
"I think Charlie Franklin ought to withdraw and that would be the right thing to do. There's no doubt he's violated the law many times," Wrabec said.
The 41 Action News Investigators have attempted to contact both Franklin and Waits several times without success for either man.
On Friday, an assistant at Waits law firm said Waits wouldn't be in the office because he was going to be putting up campaign signs with Franklin.
Both Wrabec and McDonald said they haven't accepted any campaign funds or spent any money on their campaigns yet because they're waiting for the Missouri Ethics Commission to approve their campaign committees.