I should also note that some news media [2] have reported that the IRS is almost ready to start using Login.gov. This article is from March, and obviously the IRS did not start using Login.gov in the time frame described in the article. Again, I do not know why the IRS is still using ID.me, but the justification keeps getting weaker and weaker in my opinion.
[1] https://www.login.gov/help/verify-your-identity/overview/
[2] https://www.nextgov.com/it-modernization/2023/03/plans-appro...
> In particular, that report found that the General Services Administration had continued to bill agencies for Identity Assurance Level 2-complaint services, even though Login.gov did not meet IAL2 standards.
> Login.gov does not meet IAL2, which is an identity proofing requirement set by the National Institute of Standards and Technology as part of its SP 800-63 guidance series that provides crucial technical requirements and guidance for identity proofing by government IT systems on open networks.
https://fedscoop.com/internal-revenue-service-to-expand-use-...
NIST SP 800-63 IAL2 Remote Identity Proofing
https://pages.nist.gov/800-63-3-Implementation-Resources/63A...
> ID.me uses liveness detection and advanced machine learning technologies to determine match between applicant’s image on their government identity document and the applicant’s image on their selfie.