How do I merge accounts or customer data from my old software?

BUSY provides two methods for export and import
Excel method:
You can easily export your reports and data from BUSY by using the export feature. This feature allows you to export your data from various reports, such as accounts, inventory, etc. To use this feature, you need to follow these steps:
Step 1: Open the report that contains the data that you want to export, such as accounts, inventory, etc.
Step 2: Click on the export button or press ALT+E on your keyboard to open the export window.
Step 3: Choose the file format as excel. You can also change the file name and location if needed.
Step 4: Click on the OK button to export your data.
To Import data from excel, you need to follow below steps:
Step 1: Administration
Step 2: Data Export Import
Step 3: Import Vouchers from Excel
Step 4: Select Voucher Type 
Step 5: Create Format 
Step 6: Configure Format of data field as per excel column
Step 7: Specify the Excel data sheet & Import it.
Note :- Do Process After Data Backup
XML method:
To export data from BUSY in XML
Step 1: Administration
Step 2: Data export/Import, Select data/export import(XML)
Step 3: click on export data, select voucher/master type to be exported and specify date range
Step 4: Specify a folder path where file has to be exported
To import data in BUSY
Step 1: Administration
Step 2: Data export/Import, Select data/export import(XML)
Step 3: Click on import data, specify folder path where exported data file present
Step 4: Click on the OK button to start import process