Hello!
Can someone please explain to me how I can connect my PayPal business account to Zoho Invoice (Free Account) so that whenever someone buys through my PayPal Payment Buttons, they receive an automated sales receipt from Zoho Invoice?
I will be placing PayPal buttons on my Systeme.io website.
Thank you so much.
Isabel
Welcome to the Make.com community 
First of all, you will have to create a PayPal webhook and then paste the URL into PayPal’s IPN settings.
Now, when you receive a ‘cart’ event and the status is ‘Completed’, you call the Zoho invoice.
PayPal webhook will respond with payer info, including first name, last name, email, and address, which you can use to create the invoice.
Please refer to this - https://www.make.com/en/help/app/paypal
@Ronak_Bhagdev Just reading your reply. Thank you so much for your help with this. Unfortunately my PayPal’s IPN settings are already being used by Systemeio’s notification URL, so I’m not sure what I should do. I’ve looked at your reference link, but I’m quite confused and overwhelmed with the whole information. Is there a step by step video that I can follow somewhere?
Thank you again for your help.