If it appears that many required fields were bypassed, check to see if the gifts were organization gifts. Organization contact information is stored differently than constituent information, so it may appear to be missing entirely. To see those fields you'll need to select some additional output fields when setting up your report. In the Select Columns step look for the heading Organization Contact. Any donor required fields on your donation form will populate in the Organization Contact section if it is an organization gift. Include the Organization Contact version of whichever fields you are missing information for and you should see all of the information that was collected.