If you have editing permissions (trusted list access) for the profile, Cheri, go to the Edit page and look for a green edit link after the LNAB (actually after the green question/explanation icon!).
If you see that link, you should be able to change the profiles's LNAB by clicking that link and completing the form.
If the profile is PPP (project protected), Pre-1700, or Pre-1500, changing the LNAB may be restricted.
Be sure to have proper source documentation of the correct LNAB before you make any changes!