To activate the Pay button on your invoices in QuickBooks Online (QBO), you need to set up QuickBooks Payments in your account settings. This enables your customers to pay online via credit card, ACH bank transfer, PayPal, or Venmo directly from the invoice.

You can sign up for QuickBooks Online payments, then connect this to your QBO company. Once connected, you can start creating the invoice to send to your customer, and you can specify the payment options available. Here’s how:

1. Click the Manage icon (small gear).
2. Select Payment options.
3. Enable the payment methods you want your customers to use.
4. Click Review and send.

Once the invoice is sent, the customer will see a Pay button and can complete their payment immediately by clicking it.

If you need any further assistance setting up QuickBooks Payments or have questions about managing your invoices, feel free to reach out. We're here to help you get paid faster and simplify your payment process.