I have macros set up so that I can do invoices through excel, but I want
other employees in my office to be able to have the same macros without
reprogramming every single computer. How do I do this?

What happens if you email them the spreadsheet? Do they not have the
option to Enable Macros when they open the file? If not, you may want
them to check:

Tools Options Security and ensure their Macro Security is set to
nothing higher than Medium.