JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
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Please take a look at the following article to find out information about PayPal integrated forms:
If you would like to attach a custom field to the PayPal tool, you might be interested in the following example:
You can also clone that form to check the back end.
Note, that we can not combine different payment methods (e.g. Donation and Subscription) at the same time.
If you need any further assistance, please let us know.