My daughter gets confused when she writes D,C, P AND Q. How do I know if she is dyslexic?

since you did not mention your child's age i am not sure about the same, but dyslexia is usually diagnosed after the child turns 6. most children go through the mirror image phase, where they write the letters in an opposite fashion, as would show up in the mirror. it is pretty common and so many children i know have done it, including my elder one, who learnt to do it the right way herself. you can keep teaching by repeatedly showing her the letters at home through different games and activities. do not scold or nag her for it. in case it happens even after she is 6 do speak to her doctor about it to understand if any medical assessment can help.