There's no real way to "check" it. Just replace it. However, it can be a bear and require special tools such as a "line" wrench, or "crows foot".
The way it attaches from the main fuel line to the filter is the bear part.
Reaching into your toolbox and grabbing the typical Craftsman 14 open end wrench, usually doesn't cut it.
The filter is located along the drivers fender between the air box and brake booster.
Good luck.