The previous Wiki posting regarding 2020 Tax Table changes, made about a week ago, indicated that the information was preliminary (in draft mode) and that the FACTS Development Team was waiting for the government to finalize the information publically available.
The good news is no changes are needed on the previous 2020 Payroll Tax Table Changes Wiki post made a week ago. The IRS kept the payroll figures we previously presented - with no additional changes. The officially released documents are P15 (for FCA) and P15t (page 6 for FIM and FIS).