First make a backup of the entire database just in case something goes wrong.
Then open the report in design view.
Go to File, Save As and save the report with a slightly different name like
WithZip at the end. That way you can readily go back to the original report.
Next go to View, Field List. A little window should pop up with all the
fields that can be readily added to the report. If you've lead a good, clean
life, Postal Codes should be there. If so skip the next paragraph.
If not, please detail here all things you did that wasn't part of a good,
clean life. ;-) No scratch that. You need to find the query that is
populating the report and add Postal Code to it. While in the report's design
view, go to View, Properties then go to the Data tab. The record source
should be the name of the query. If instead it says something like
"Select...From" then post back what all it says. Close the report and save
all changes. Open the query from above and add the Postal Code field. Go back
to the report and open the Field List.
Once you find the Postal Code field in the Field List, drag and drop it on
the report in the proper place. Not knowing what your report looks like, I
really don't know about how you will have to move labels and existing fields
around.
Run the report. If it works AND you are using the newer version of the
report, you may need to modify any buttons or switchboards that run the
report.
