Hello Randikay,
Welcome to the HP Forums!
I understand your Photosmart C7100 is defaulting to the fax when printing a document. What is your operating system on your computer? Click here to find out: Windows or Mac?
Please follow these steps if you have a Windows computer:
1) Click on the Start Menu
2) Click on Devices and Printers
3) Right click on your printer, then click on set as default (Make sure the Photosmart C7100 is selected, not the fax Photosmart C7100.)
Looking forward to hearing from you.