Witr And Dua E Qanoot
Please see the following response: Discussion 48350 • Reply 48419
Witr is not an independent Salah, it is an additional rakah to make your tahajjud rakahs odd (‘taaq’) which is done at the end after last rakah of tahajjud salah. It is optional to do dua-e-qanoot in witr and any dua can be done in that, nothing has been explicitly prescribed by the religion in this regard. And yes, tahajjud can be offered after Isha Salah if one thinks one won’t be able to get up early for tahajjud salah.