Disputing the Number of Rakaahs during the Taraaweeh salaah

Q: Salaah-213: The followers have been disputing the number of Rakaahs performed. While some say that it was eighteen, others are adamant that it was twenty. What should be done in this case?

Answer: The opinion that the Imaam favours will be taken into consideration.

Fatawa Rahimiyyah vol.2