Hi dieseldigit,
Thanks for checking with us. You don’t need to create a whole new MYOB account to purchase these. MYOB Business Lite is set up as 1 subscription per company file, so for your 3 company files you’d need 3 separate Business Lite subscriptions. You can generally still use the same email address and login details for those subscriptions, so you can manage them under the same sign-in. If the pricing page isn’t letting you continue, please try clearing your browser’s cache or using a different browser, then try again. If it’s still not working after that, please reach out to our Sales team here: Contact the Sales Team | MYOB.
Regards,
Sai