Sage 50 Accounts Professional can be used on up to ten users at a time and so it suitable if you have a busy office with a lot going on. Do you have several staff members entering information simultaneously, for example entering orders, or quoting customers, processing cash or invoicing?
On-line VAT submissions requires an additional MTD (Making Tax Digital) for Sage 50 module.
Have you considered Sage 50cloud Accounts Professional? This cloud version includes all the features of the desktop is subscription based and includes the VAT MTD module.
Visit https://www.sageconsultants.co.uk/sage-50cloud-accounts-professional for more information.