Using E-Verify can be tricky, especially when you hire immigrants. Finding the appropriate terminology for the corresponding identification string is where many users find confusion.A quick internet search will provide several resources. Here is a Helpful Site you can reference to ensure you are using the proper information from the immigrant documents.
If you have additional questions, USCIS has a help team experienced with these types of documents. Local SHRM chapters and USCIS may offer webinars from time to time to enhance your knowledge in this area.