To reset, you need only turn your printer off and back on. If the printer reboots and indicates there is still a paper jam, you wold then be looking at one of two possibilities:
To be thorough, you may wish to start at the beginning:
Remove the paper from the MP tray.
Hello! It's been a little while since we chatted, so I wanted to check back in and see if you had had any success with your printer?
Please let me know. I look forward to hearing from you!