Hi there, @jeffelmer.
Your son needs to sign up for the QuickBooks Online US version to use the software. I'd be happy to provide you the link for him to subscribe and resources to guide him with the process.
To help your son choose the right product for his business, as well as some resources, like videos in setting up the account, provide the following articles:
Please know that you can always drop by if you have any other questions. I'll be happy to help you out.
Hi it’s me again. My son subscribed but is having a little trouble getting his accounts set up correctly. He lives near Bartlesville, Oklahoma, USA. Can he get the same chat help like I do here in Singapore? Can you recommend someone he can contact for help? I appreciate any assistance you can provide. Thanks