One of the many benefits of connecting with Stripe is the ability to add the Stripe Payment link to your emailed invoices and Late Payment Reminders. This will allow your customers to pay their current balance online.
Go to Settings > Email and SMS Templates > System
Click on the Invoice template
In the Email section, click the Insert Variable icon, then select Online: Payment Link (button).
Save
Adding the Stripe Payment link to your Emailed Invoices:
Adding the Stripe Payment Link to your Late Payment Reminders: