NSF announced that supplemental funding requests, including Career-Life Balance requests, can now be prepared in Research.gov. Supplemental funding requests can be submitted in Research.gov, regardless of the system used (Research.gov, FastLane, or Grants.gov) for proposal submission. FastLane supplemental funding request functionality will remain available, in parallel, for the preparation and submission of new requests until January 27, 2023.
For more... Read more about Preparing NSF Supplemental Funding & Upcoming FastLane Deadlines