Is it possible to have a user enter initial information (like a clients name)
at the beginning of a document, and then have it automatically fill in the
field wherever necessary in the document?

I want to create a template that automatically inserts information in
various other places in the document based on what a user types initially.
For example, client name or number, or business name (which will need to be
entered in other parts of the document).

I know there must be an easier way than retyping. Thanks in advance for any
help that you can offer.