How can i add the cusyomer name to the invoice? a the moment only the bull to name shows

Hello and Welcome to the Community, leah16!

Select the 'Customer' field in the top-left of the invoice and begin typing the customer name, a drop-down will appear where you can select the customer to add to the invoice if they are already existing, or select 'Add' then enter the name and save to create a new customer. 😊