Hi Mary48
I understand you are getting a false paper jam error.
Try and print a hardware self test to find out if it is hardware or software related.
I would download and run the Print and Scan Doctor to fix common printing and scanning problems.
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c02073861&jumpid=ex_r4155/hho/ipg/ccdoc/trailhead_doc
I have included a document for the paper jam message for the Deskjet f380.
If you require further assistance please provide the following so I can assist you
better.
Is the paper jam message showing on the computer or the printer?
Let me know the results from the Print and Scan Doctor.
What operating system are you using?
Here is a document to check your operating system for Windows.