Former President Donald Trump potentially faces over $100 million in tax liabilities due to a disputed tax break on his Chicago tower.

The IRS alleges Trump improperly claimed double tax benefits totaling $826 million in losses from the tower.

Eric Trump, VP of the Trump Organization, believes the tax issue was previously resolved.

Separately, Trump is appealing a New York civil trial ruling that fined his company for valuation fraud.

President Joe Biden has critiqued Trump's tax practices and increased IRS funding to audit the ultra-wealthy.

The IRS has refrained from commenting on the specifics of Trump's tax information.

Trump is currently campaigning for re-election against Democratic incumbent Joe Biden.