Can I use Zoho Book subscription with two organisations

Can I use Zoho Book subscription with two organisations

I have two organisations under one Zoho book account.

I manage my step dad company under one organisation and my own company under my own organisation, all within the same account. I have purchased a subscription for my step dad organisation, but my organisation does not benefit from the subscription.

Do I need to buy two license for each organisation under the same account? That is out of budget for me, I thought that buying the license would unlock all created organisations.

Best regards,
Steven Rosato