To send an invoice to your client using BUSY you can use Whatsapp, Email, and Export in PDF option.
Below are the steps to use it:-
Step 1: If you want to use the WhatsApp feature you have to contact to customer support number i.e 8282828282 to update the WhatsApp API in the SMS configuration option.
Step 2: For Email, you have to go Administration menu then click on Email Configuration configure your Email ID and Server name, port there, and create an app password from the Manage your Google account option under Email.
Step 3: For normal Export in PDF you have to open the Sale Invoice then click on the export option from there click on the PDF option and export it in the Desired location in Desktop then from there you can share that PDF with your client.