@zaibi12345 Hello,
I'm sorry but I will ask some other question.
If I understand correctly, what you need is
Your LAN -> Netgate SquidProxy -> Your organisation LAN -> Your organisation Proxy
And when you set your organisation proxy on a client inside your LAN, everything works fine, but you want to get it working when using your Netgate SquidProxy as well, am I right ?
(Warning : I may be wrong starting from here)
I think the issue here is that the "misc tab proxy setting" is only for the pfsense, not for your Squid Proxy, and what's going through your own proxy doesn't forward to your organization proxy.
I didn't test it yet, but this is interesting, so I will probably try this out on my lab next week, but from what I found around, there's this line in squid config that need to be set up :
cache_peer <Parent_proxy_IP> parent <port> 0 no-query default
In PfSense+ you can find similar option under
Services > Squid Proxy Server > Remote Cache Tab
When adding a new remote cache, you can add a remote parent server.
Did you get that already configured on you proxy server or not ?
If not, can you try it ?
I'll probably check this on my lab next week, good luck with your config