Open the PDF in Adobe Acrobat Pro
Select Tools
Choose Prepare Form
Select the PDF file
Let Acrobat detect form fields automatically
Add or edit text fields, checkboxes, radio buttons, dropdowns, and signature fields
Adjust field size and placement as needed
Set field properties such as name, required status, and formatting
Save the file as a PDF form
Test the form by filling it out
Use another PDF editor if Acrobat Pro is unavailable
Add form fields manually in the editor
Save the completed fillable PDF
