I am new to proseries professional 2018. I have one assistant currently, and other two tax preparers soon.  I am owner of small tax firm. I want them work on returns or input data and I review and sign at last. I want network sharing is for all users can access data files or returns. That I need to have network infrastructure, what is simple device should I purchase service? Please help detail. I heard. VPN ? Correct?  How to get VPN? 

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