OpenVPN dial in

I have an LEDE TP-Link 1043 ND router. I installed some OpenVPN clients to connect other networks. It works well.
I configured a server on it. I can connect to it. I can ping the interfaces of routers but I can not access my local network.
How can I setup the correct routing?

You just have to place your tun interface into the correct zone (LAN probably).