If you can't find the name of your supplier in the contact list dropdown you have two options to create a new contact. The first option is to head to your preferred accounting software to add a new contact. Then you can run a sync in Figured to pull it through to begin using it in your sales & purchase transactions.
Alternatively, you can create a new contact directly from Figured. To do this make sure you select the Post to check box, then you can simply type in the name of your new contact and press enter. This will then save and create a new contact when the transaction is posted to your accounting software.