If you are a Prime required to report, once you login to the designated portal, you will have the option to report via the Applications under the App Navigator.
For Tier 2 Primes, you will see either Tier 2 Project Reporting which is based upon projects and usually is associated with cost centers or business units.
For Tier 2 UDRS or Standardize Tier 2, it will also have this label under your App Navigator. Tier 2 UDRS and Standardize Tier 2 have you report spend by classification or supplier number and in some cases as a percentage of your overall spend.
If you do not see a reporting application when you login, contact Support or the designated CSM to confirm you are required to report.
If you receive an email saying that you are required to report and you have already summitted your report, then disregard the message. The system send auto messages to all Primes to make sure you report your spend.