I'm not sure what you've read, but that isn't quite accurate. Formula and/or breastmilk should remain your baby's main source of nutrition until close to 1 yr of age, so if a baby is refusing to take milk, there's probably something else going on, like Seona said. Solids are mainly for practice and nutritional supplementation and aren't intended to replace milk for several more months.
There's an announcement at the top of this forum with some information that may help you decide if your baby is ready to start solid food. HTH!