Open the PDF in a PDF editor or viewer that supports editing
Look for the Text, Fill & Sign, or Edit PDF tool
Click where you want to type
Enter your text
Adjust font, size, and placement if needed
Save the edited PDF
If the PDF is not editable, convert it to an editable format or use a form-filling tool
On mobile, open the PDF in an app with annotation or text tools
Use a browser-based PDF editor if you do not have desktop software