[Koha] need help with OPAC/cataloging

good morning all, I am using KOHA 3.2.7. I am downloading from z39, filling in Items, saving it. yet when I go to the OPAC to make sure it is there I am not getting any Holdings to come up-everything else is there. students have to go to ISBD or MARC tabs to find call #. what am I not doing? thanks in advance. Margaret