I have to fill in some forms and email it but the forms are a xerox of a file, saved as a PDF. So, most PDF reader and fillers are unable to recognize I'm trying to type on the document. I also need to provide a signature on the document but it's doesn't have to be a certified signature( I ran into this with adobe). Anyone know of any good software to use?

I had some luck with master pdf editor 5 but it gave the file a watermark that I had remove with libre office, and I still couldn't sign it.