To populate scores and a rank list, you'll first need to add scoring questions. You can do this any time before interview day.
Once the interviews begin and interviewers enter their scores, you can review and adjust the final scores and rankings. Click Scores & Ranks from the left menu. From here, you can use the:

When viewing the individual scores via the score icon, you’ll notice there are two different scores: average and final. By default, both are calculated by averaging each of the interviewer's scores (you can exclude any interviewer's scores by deselecting the checkbox in their column). However, you can adjust the final score by entering a different value in the Final Score field, entering an explanation for the change, then clicking Save.

Click the Ranks button to access a Main Rank List. From here, you can also create new rank lists as needed and choose which applicants to include.

By default, the Main Rank List includes all applicants from all sessions, ranked by their final score. Applicants with the same score are listed in alphabetical order.
You can manually reorder applicants in the rank list by clicking and dragging the applicants into your desired order. You can also click Edit Rank List to select or deselect the applicants you want to include in the rank list. When you're finished making changes, click Save. You can reset the applicants to the default ranking at any time by clicking Revert to Original Order.

When it is time to submit your Rank Order List (ROL), you can export a CSV file with your ranking details and then upload the file directly to NRMP's R3 system.
From the rank list, click the Download icon in the top-right.

The downloaded file includes the following data points:
Before uploading your rank list to NRMP's R3 system, you need to modify the file to include only the required data fields. To prepare your file:
From the Program Portal, you can view an applicant's interview scores and ranks in multiple places, such as:

Note: processing times vary depending on the information being synced between the Interview and Portal Portals. Most updates appear within a few minutes, but some can take up to 15 minutes to show in the Program Portal.