Whenever I need to fill out a PDF or make minor edits to one, my tool of choice is PDF Escape, an online PDF editor that’s free.
You can perform such edits pretty easily with PDF Escape, an online PDF editor that’s free and also lets you edit password-protected PDF documents in the browser.
With PDF Escape, you can hide* parts of a PDF file using the whiteout tool or add annotations with the help of custom shapes, arrows, text boxes and sticky notes. You can add hyperlinks to other PDF pages / web documents.