You are not able to view and edit a PDF form on WordPress. This plugin, PRO2PDF, works with Formidable Forms to fill PDF form fields. You would need to create a form with the Formidable Forms plugin, then use this plugin to merge the submit data from the web form to the PDF form.
PRO2PDF will create a download link, automatically open on users desktop, and/or email the PDF as an attachment, but it will not display the PDF in WordPress.
We have another plugin, E2Pdf that can display the PDF in WordPress, however, the data must be entered into a web form. E2Pdf works with Formidable Forms, Forminator, Caldera Forms, Gravity Forms, and Divi Contact Form.
Both plugins are available for free in the WordPress plugin repository.
Let us know if you have any other questions as we remain at your service.