Hi @AMF-Echo,
I appreciate you reaching out here in the Community regarding the software installation. Let me clarify things about how a single-user license work for QuickBooks Desktop.
If you purchased a single-user license, you can install the software and use it solely by one specific person. One primary computer and one additional computer (e.g., a laptop or a home computer that you own and use in your business) for use by the same person.
As long as no other person is accessing it, your program should work without any issues. You can still use your QuickBooks by entering your registration and licensing information.
Also, we've provided answers to frequently asked questions about the QuickBooks Desktop service discontinuation policy. For more details about it and the service discontinuation, check out this link: QuickBooks Desktop service discontinuation policy.
Get back anytime you have more questions about the QuickBooks installation. We're always ready to help. Take care.