I am replacing my 12 seer condenser with a 13 seer condenser both are r22 the tech said I need to replace my inside coil too because it's a cap tube coil Do I have to replace my inside coil too?

You should. For best efficiency a matching coil should be used and almost all 13 seer coils use an expansion valve. I am not saying it will not cool or will not work it is just a condition that can cause you many problems down the road.