Last Thursday (and updated on Tuesday), NTA released its Part IV Kwong Blog post (and updated the other three parts as of last Thursday, too) — tax principal rather than just penalty/interest-focused.

I edited a comment of mine to a post from about a month ago re *Kwong,* but it doesn't look like doing so gets it back into circulation for what appears to be real-time stream-of-consciousness discussions in reddit, so here goes:

[https://www.taxpayeradvocate.irs.gov/news/nta-blog/beyond-penalties-and-interest-how-kwong-may-affect-missed-tax-refunds-part-iv/2026/05/](https://www.taxpayeradvocate.irs.gov/news/nta-blog/beyond-penalties-and-interest-how-kwong-may-affect-missed-tax-refunds-part-iv/2026/05/)