Is this
pokerstars? If so, in PokerStars go to "Requests" and request your tournament history.
These tournament results will be emailed to you.
Save the email to your desktop (or anywhere), but make sure you save them as a TXT file.
Now go into PokerTracker and choose to manually import. If you choose to import from a directory it will go through all the files in that folder to receive
hands. If you choose to to import from a file you'll have to pick that TXT file you saved.
On other site (UltimateBet) I have to manually out the results in.