"According to the IRS, the company still has $13bn in assets, $12.9bn of it in cash or cash equivalents. After it officially dissolved, the IRS sent the company a tax bill for $12.7bn"
Well, that's very generous of the IRS to leave Altaba a couple hundred million in walking around money. Also very convenient that the IRS targeted almost exactly the amount that Altaba had in the bank. I'd fight that bill, too (although I'm not worth any number of billions, so I'd probably lose).