Article says “ According to bankruptcy filings on April 27 and 28, the IRS filed claims worth nearly $44 billion against the firms, including FTX.US and Alameda Research.”
Clicking through to the list of filings shows about 1850 items (rounded, 93 pages of 20 filings each), many of which don’t appear to be against FTX.
For example there’s a $2.5 billion one on the first page against “Paper Bird Inc”, who I haven’t looked up yet.