Looks like the FIRE system is being replaced by IRIS

[MaximilianKohler]

• https://www.irs.gov/newsroom/irs-opens-free-portal-to-file-information-returns-new-electronic-option-can-reduce-millions-of-paper-forms-1099-estimated-to-be-filed-by-businesses-in-2023
• https://sovos.com/blog/trr/what-you-need-to-know-about-the-iris-system-for-2023-reporting/

It was briefly mentioned back here in 2022 #22 (comment)

FIRE still works, but this might be the last year it will work. Has anyone tried it out? Supposedly you need a new TCC for the IRIS system but it's showing my FIRE one as valid. Oh, I guess "IR TCC" is for FIRE and "IRIS TCC" is now required also.