How do I remove the paypal integration from my jot form?

How do I remove the paypal integration from my form?

I do not need any payment options but when I try submit my form it ops up with an error message "Invalid paypal account?"

You have added an integration to your form, it is labeled as "Products", but seems like you have not added a valid PayPal email address, you have instead entered a name: 

You should enter your PayPal account email address instead of the name you have set up there. 

You could remove  the integration by clicking on it and the trash icon (red button on the screenshot above). But this will completely remove the payment integration which means that your products will also be removed from your form. 

If you do not want to remove the products, you should simply correct the email address and enable the payment authorization so your users do not get charged automatically. 

How-to-Enable-Payment-Authorization

Hope this helps.