Beginning on March 19, 2022, SAMS Domestic will implement the newest version of the SF-424 forms on all applications. The SF-424 will be updated from V3.0 to V4.0, which will require applicants to enter their SAM.gov UEI instead of the DUNS.
When submitting federal applications after this date, make sure to check agency form requirements as appropriate.
To learn more about the UEI transition, see DUNS to Unique Entity ID (SAM) Transition on SAM.gov.