More clients. One way of working.
Standardize documents, posting, VAT, payroll, and reporting for every client from one system.

Clients in one system
Switch between the companies you manage without signing in again. Each client has their own books; you keep the same workflow.
New clients first
Start with new clients. Existing ones stay on current software until you decide to move them.
Control before posting
Incoming documents in one place, with review before posting. After checks, close the period and prepare VAT. Payroll runs in the same system.