In the two-unit (rakah) prayer in Islam, known as “Salat al-Fard” or “Salat al-Witr,” the Tashahhud is recited while sitting in the second unit (rakah) of the prayer. Here is what you should say during the Tashahhud:

1. Sit with your knees on the ground, your right foot upright with the toes pointing toward the Qiblah (the direction of the Kaaba in Mecca), and your left foot underneath your right leg.

2. Raise your right index finger, pointing it upward or slightly towards the Qiblah.

3. Recite the Tashahhud:

**أَشْهَدُ أَنْ لَا إِلَٰهَ إِلَّا اللَّهُ وَأَشْهَدُ أَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ**

Transliteration: “Ashhadu alla ilaha illallah, wa ashhadu anna Muhammadan ‘abduhu wa rasuluhu.”

Translation: “I bear witness that there is no god but Allah, and I bear witness that Muhammad is His servant and messenger.”

4. After reciting the Tashahhud, you can lower your index finger.

5. Then, offer greetings upon the Prophet Muhammad (peace be upon him), which is known as the “Salat al-Ibrahimiyya” or “Durood.” You can say:

**اللَّهُمَّ صَلِّ عَلَى مُحَمَّدٍ وَعَلَى آلِ مُحَمَّدٍ كَمَا صَلَّيْتَ عَلَى إِبْرَاهِيمَ وَعَلَى آلِ إِبْرَاهِيمَ إِنَّكَ حَمِيدٌ مَجِيدٌ**

Transliteration: “Allahumma salli ‘ala Muhammadin wa ‘ala ali Muhammadin kama sallaita ‘ala Ibrahim wa ‘ala ali Ibrahim innaka hamidun majid.”

Translation: “O Allah, bless Muhammad and the family of Muhammad as You blessed Ibrahim and the family of Ibrahim. Surely, You are Praiseworthy, Glorious.”

After reciting the Tashahhud and offering greetings upon the Prophet Muhammad (peace be upon him), you can include a Quranic supplication (dua) of your choice.
You can ask for guidance, forgiveness, or make any other sincere supplication. Here’s an example:

اللَّهُمَّ اغْفِرْ لِي وَارْحَمْنِي وَعَافِنِي وَارْزُقْنِي وَاهْدِنِي وَعَافِنِي

Transliteration: “Allahumma-ghfir li warhamni wa ‘afini wa arzuqni wahdini wa ‘afini.”

Translation: “O Allah, forgive me, have mercy on me, grant me well-being, provide for me, guide me, and grant me good health.”