Yes. Any data from your current software can be imported into SAP Business One.

The more important consideration is the cost effectiveness of importing that data.

Typically the “master file” data (Customers, Vendors, Inventory and Chart of Accounts) is straightforward to import and can usually be done in a cost effective timeframe.

Transactional data is a completely different story.  The transactions within a software system are normally broken down into a number of inter-related files and thus very difficult to capture.  It is certainly possible but the expense to do so could be prohibitive.