How To Find CC Holder's IP Address for Remote Desktop Connection

[Boeing.]

I was reading a carding tutorial, and the instructions went like this. . . .
Lets Start Carding:
1. Connect to your vpn software and chose ip - country you want.
2. Connect to RPD ( Remote Destkop connection), must be same country (IP), state as card holder Address. Do not forget that.
3. Now from your RPD, connect to socks5 via mozilla firefox, example 97.77.96.226 34539 United States, MUST BE SAME ASS CARD HOLDER: COUNTRY, STATE, CITY!
And this is where I got stuck.
He mentions earlier that I need the victims IP address so it appears I'm ordering from their computer and not mine... My question is, if I'm provided with the physical address of the victim, how do I find their IP address so I can connect to their computer with remote desktop connection?