Hi there,
Thanks for reaching out to the Community. I'd be happy to help with sharing more info on how the subscription works in QuickBooks.
At this time, you're allowed to have one subscription per account. If you have any questions about the subscription plans, feel free to contact our support team using this link here. You can also ask me any other questions. Please make sure you're as detailed as possible so we're both on the same page.
I'll be here in case you case need anything.