If you are a small business owner or freelancer, you may need to customize invoices for your clients. FreshBooks is an online accounting software that allows you to create and send invoices to your customers. Customizing an invoice in FreshBooks can help you create a professional and personalized look for your invoices, which can help you stand out from the competition and make a good impression on your customers. Knowing how to customize an invoice in FreshBooks can also help you save time and effort when creating invoices for your clients.