There are two issues to consider with regard to your question.
The first is whether the FCRA section of the AAN would be required at all. If you denied a loan because you couldn't verify income and you did NOT use the credit report in making your credit decision, then you would not fill out any part of the FCRA section of the AAN (including the credit score section).
The second is whether you include the credit score IF you used the credit report in making your credit decision. The argument that I have heard, and agree with, is that if you DO use the credit report to make your credit decision, AND the credit score is provided with the credit report, then you would complete the FCRA section of the AAN and you would also include the credit score. The argument is that if you used the credit report and it had the score, how can you argue that the credit score was not used. It's better, in those cases where you actually used the credit report, to disclose the credit score.