Hi,2005 freestar how do you release thefuel lines from the fuel filter?

You need a fuel line removal tool. You put it around the fuel line, then slide it into the connector to expand the retaining spring. The tool can be purchased at Autozone or such for a few bucks.

And some of the parts houses will loan you a tool for the job.

You can also just use a tiny screwdriver to open the fitting. This is how I did it.