4 Wire Thermostat

All

I removed the existing thermostat 4 son but he forgot to label the appropriate lines. I ordered 4 LinePro son Honeywell 8000 thermostat and need to know which wire goes to what.

Can someone please give me some advice?

Take a look at the manual:
http://www.honeywell-thermostat.com/manuals/tl8230a-1003manual.pdf

It seems that your answer is at the bottom of page one. The two black tresses are the first two terminals, both red for the last two.

Red on red, white on white, green on green, blue or yellow, sometimes yellow.