From the Ahadith, there is proof that Salaatul Taraweeh consists of 20 Rakaah of which 8 Rakaah make up Salaatul Layl and not Salaatul Taraweeh.
A specific point shown to us by the Ulema is that the entire Quran consists of 540 Rukus. Hazrat Uthman Ghani (radi Allahu anhu) used to perform 20 Rakaah of Taraweeh every night in Ramadaan and with one Ruku recited for each Rakaah, the entire Quran used to be completed by the 27th night of Ramadaan. Wherever Hazrat Uthman Ghani (radi Allahu anhu) had stopped to make Ruku in Salaah, that stopping point was marked in the Quran with a Ruku sign. This is proof that the Khulafa-e-Rashideen performed 20 Rakaah of Taraweeh and that we have to follow the example of the Khulafa-e-Rashideen (ridwanullahi ta’ala ajma’in).

October 7, 2008 at 9:05 am
Dear Sir/Madam
Would you please let me know,is there any printed quran with 540 ruku’ (Ain marker) or stop? I want to know the exact places of its ruku’at(ain markers),for example, the first on the 7th verse of bagharah, etc .The available Qurans have 558 ruku’(Uthman Taha,Sudia Arabia).I would be appreciated if you introduce me the books in which the places of 540 ruku’ are written or the scholars who work on this topic.Thank you in advance for your kind cooperation.
Regards
Nazila Zarghi