https://www.irs.gov/ru/e-file-providers/1120x-ty2022v3-point-0-release-memo
1120x TY2022v3.0 release memo | Internal Revenue Service
The 1120x TY2022v1 Release Memo provides information to software developers and/or transmittors about the release of schemas and business rules for tax year...
releasememointernalrevenueservice