Tennessee Sen. Bob Corker failed to properly disclose millions of dollars in income from real estate, hedge funds and other investments since entering the Senate in 2007, according to new financial reports.  

Corker, the Senate’s third highest-ranking Republican, has, as a result, filed several amendments to his original personal financial reports -- which included dozens of errors and omissions, as first reported by The Wall Street Journal.

Corker filed the amendments Friday after inquiries from The Journal that were prompted by a complaint filed last month by the nonpartisan government watchdog group Campaign for Accountability.

Daniel Stevens, the group’s deputy director, told FoxNews.com on Wednesday that more questions remain.

“We’re still trying to figure out the next step, but we plan to file another complaint,” he said. “There are a lot of red flags.”

Corker, a member of the Senate Banking, Housing and Urban Affairs Committee, said he was “extremely disappointed” in the filing errors made in the earlier reports.

After completing a full, third-party review, we have corrected this oversight,” he also said.

Capitol Hill lawmakers are required to submit the disclosure records in large part to reveal potential conflicts of interest.

Corker, also chairman of the Senate Foreign Relations Committee, reportedly hired an independent firm to audit his reports, following the Journal’s inquiry.

The lawmakers are allowed to file amended disclosures without penalty. However, Corker’s new filings -- estimated to address roughly $2 million to $8 million in either incorrectly or underreported income and assets -- appear beyond the typical changes.

And whether the Senate Select Committee on Ethics will address the issue remains unclear.

The amended forms show Corker failed to properly disclose at least $2 million in hedge-fund income; didn’t properly report millions in real estate income as a result of an accounting error; and failed to disclose millions of dollars in other assets and income, according to The Journal.

However, in one instance Corker significantly overreported investment income, according to The Journal.