Tahajjud prayer is offered after isha and before Fajr. The best time to offer Tahajjud is the third and last part of the night. Tahajjad can be prayed even ten minutes before the Fajr. It is better to sleep and then wake up for Tahajjad. There is great importance of Tahajjud in Islam.
There can be one or more than one part of Tahajjud i.e., two rikaat nafl or more than one nafl i.e., nawafil. You can pray two rikaat nafl i.e., one nafl in Tahajjud or you can pray nawafil in Tahajjud.
After doing wudhu, you can offer Tahajjad according to the following steps;
After the completion of one nafl, if you want to offer more nawafil then you can offer them in the same way as first nafl is offered.