I have a workbook that I use for making reservations. The workbook contains
different tabs into which the customer information is typed in once, and then
appears on the different tabs within the workbook. My question/problem is, I
would like to have all the customer information that I type into my workbook
to also be transferred to another workbook that would keep all the
information for every group I enter.

For example: I make a workbook for XYZ company, and automatically transfer
all of the customer information on the customer tab to a single line within a
wookbook named Master Groups. I then make a wookbook for ABC company, and
automatically transfer all of that customer information to the Master Groups
workbook as well.