There is a limitation to Windows 7 based tablets. They are not full fledged versions of windows 7. You won't get the same function of a laptop, let alone a high end laptop.
You can scan, print, and fax from an android based tablet. You need a supproted printer/scanner that can work via wifi, and proper apps to do web based or network based faxing.
Don't expect direct use of a Faxfinder/MSfax support on a windows based tab.