Before we can start sending invoices, we need to set up a payment gateway and add a product. To integrate a payment gateway, you can see this banner here, or you can click on the integrations tab on the far right corner and it will take you there directly. Here you will see a list of supported payment providers such as Stripe, PayPal, etc. To connect Stripe, for example, click "connect," then connect to Stripe and follow the instructions to link your account. Once your gateway is connected, the next step is to add a product. Click the products tab at the top, then click " create product." On this screen, you can enter information about your product, set prices, add any options, and fill in the search engine listing details. When you're done, click "Save." Once you have at least one payment gateway connected and you have one product, you can send your first invoice. Click the " Invoices and Estimates " tab, then click " New" and "New Invoice." At the top, you can give your invoice a name . You can choose a client. You can add the product you just created. And you can fill in any other details you need. When you're ready, you can submit it and start collecting revenue. You can do a lot more in the payments tab, including subscriptions, contracts, coupons, and payment links. And it's all connected to your contacts and invoices.