To fill out a PDF form, open it and then go to the left panel and click Fill and Sign. If your PDF was saved as an Interactive PDF with form fields for data, you would not need to click the Fill ...

If you've been sent a form you need to fill out in PDF format, just tap on it on your iPhone or iPad. It will open in a Markup screen. Next, tap one of the boxes in the form, such as "Last Name ...