Hi B.Caseyy,
As per the description above, you want to use the Typewriter Function to edit PDF, Is that correct?
It is no longer called the typewriter tool. It is now "add a text comment". Select Tools at the top left, then "Comments",
then the icon on the ribbon that looks like a capital T.
You may also refer to the following link: https://answers.acrobatusers.com/How-I-typewriter-tool-Acrobat-Reader-DC-q294336.aspx
Please confirm the version of Acrobat installed on your computer?
To check the version of Acrobat, launch Acrobat>navigate to Help menu>select About Adobe Acrobat
Which operating system do you have- Windows/Mac?
To download Acrobat Reader(Free version): https://acrobat.adobe.com/in/en/acrobat/pdf-reader.html
To download Acrobat Pro DC: https://helpx.adobe.com/acrobat/kb/acrobat-downloads.html
Update this discussion with the results.
Regards,
Anand Sri.