How to transfer amount between business?

How to transfer the amount one business to another?

Do you mean between two Manager Businesses - you can’t directly as the consolidation feature hasn’t been released. Until then you need to set up an Inter-Company C/A (current account) in each business and do the transaction take up in the 2nd business by Journal.

However, if you mean between a Customer and a Supplier within the one Manager Business then read here