Open the PDF in a PDF editor that supports form fields
Enable form creation or form editing mode
Add text fields for typed responses
Add checkboxes for yes/no options
Add radio buttons for single-choice selections
Add dropdown menus for list selections
Add date fields if needed
Add signature fields if needed
Adjust field size, position, and alignment
Set field properties such as required, read-only, or default value
Save the PDF as a fillable form
Test the form by opening it and entering sample data