This might be the worst punishment that Trump faces. His dwindling cult won't care that he's a tax cheat, lied about making donations, lied about donating his presidential salary to charity, lied about how rich he is, lied about how much he inherited or that he had secret foreign (including Chinese) bank accounts while president. But there are a lot of people who didn't see Trump for the fraud that he is, who now are starting to realize that they've been fooled.
Trump's main business is masquerading as a business-savvy billionaire and capitalizing on that phony image. I suspect that actually successful businesspeople will be reluctant to do business deals with him. Just as Trump became the kiss of death when it came to 2022 political endorsements, Trump-labeled hotels, golf courses, et cetera will be doomed to failure.
The exposure of Trump's taxes also revealed the IRS doesn't have the organizational skill to unravel "complicated" tax returns of the very wealthy and big corporations.