Created logo with transparent background, but background still shows white box

You can't save as jpeg.

When saving try:

File >> Save for Web >> PNG24

Check the box for transparency.

Also take a look at this thread which gives some more details.

I'm not sure I understand what your problem is.  The file that you attached to your post has a transparent background and when you insert it into a webpage like this post which has a white background, it will appear as intended.  If you add the logo as a layer to an image in Elements, it will have a transparent background and only the logo shows above the image (with no white background).

You say that when you open the file in other programs, a white background is placed behind the logo.  What other programs are you talking about?  Perhaps they cannot display transparency properly.

Please post Photoshop Elements related queries over at 

https://community.adobe.com/t5/photoshop-elements/bd-p/photoshop-elements?page=1&sort=latest_replies&filter=all

jpg does not support transparency – period. 

How did you create the png? Does Photoshop Elemente even have Save for Web? 

Why don’t you use a format like psd anyway?