Synchronizing QuickBooks and Point of Sale

I have Point of Sale software and Quickbooks installed on my computer, which is not at the Point of Sale. If I make entries into Point of Sale on this computer to see how things work, will it make changes to my QuickBooks company files? 

I am the treasurer of a not-for-profit organization.  Because I am a not-for-profit I have no customers, I create no invoices, etc.  I use QuickBooks to receive donations, keep my banking accounts in order and periodically create statements.  I do not use all of the bells and whistles that QuickBooks offers me.

We have a small retail store in our building where we sell things for the organization.  Our customers are in person, pick up the products on display and pay at the point of sale.  We purchased Intuit Point of Sale software and I am trying to figure out how it best fits in our application.  It looks to me like the Point of Sale Software does everything I need it to do to manage the store.  We have installed the package but we have not implemented it yet.

I live 50 miles away from the store.  I am thinking that the only data that I need for QuickBooks on my computer is the total sales for some period of time that relates to a deposit in the bank.  The Intuit Support people tell me that I have to install QuickBooks and Point of Sale software on both computers but in order to stay in sync I can only use one of them at a time and I have to transmit files back and forth.  I don't think I need all of that Point of Sale data and that the two computers can run independently as long as the sales and deposits remain in sync.

Am I missing something?

Rocko4016