Email auto-forward help needed

My primary email is a cox.net account but i recently created a gmail account that I will be using since I will be cancelling my Cox soon. I use thunderbird and want my emails from my cox account forwarded to my gmail account. I thought I set it up correctly because they get forwarded when I log in under the gmail web page...just not in thunderbird. Is there something I need to do in TB to make this happen?

I'm not using Cox but all those settings would be on your Cox webmail site online. In Thunderbird all you would show for accounts would be your Gmail one as that's the one receiving all the mail from Cox I believe, so any mail forwarded online from Cox to Gmail online would arrive in your TB Inbox in due course, hopefully.

If you are having problems setting up Gmail in Thunderbird try their support: Thunderbird Support | Thunderbird

Note that once you cancel cox you won't get those emails anymore.