What claim did she specifically make that was false? I did a quick search and found that she referenced his 2018 tax return, but can't find any false claims that she made about him not paying taxes. Please provide some evidence, stating that others must do the work to disprove a claim you make is not acting in good faith.
She didn't reference his 2018 tax return in her Tweet.
People have mentioned that tax return to try to defend her, but she tweeted that claim in December 2021, a year for which Musk paid billions in taxes, not 2019.
https://www.cnn.com/2021/12/15/investing/elon-musk-elizabeth...
True it's only one example, but surely you don't expect me to list every attack against him in a HN comment? You can find a lot more attacks if you want to investigate further.