I took the NLN at Maui Community College. On the day of the exam, the person giving the test told us - to tell the computer - to send a copy to Maui Comm Coll, which is where I wanted to go to nursing school
A few days after I took the exam, the NLN company sent my scores to MCC.
My suggestion is YES
make a zerox copy of the one original score sheet you received from NLN and hand it in with your application
That way, the person looking at the app knows you took it, and knows what scores you got.
Call 2 weeks later, or visit the office, and ask them if they got your application & if they need official scores.
Hope that helps.