Learn Turkish: Lütfen bana çıkışı nasıl bulacağımı tarif et. - Please describe to me how I will find the exit.

It pairs the question word nasıl (how) with a future object clause. We take bulmak (to find), add the future suffix -acak, and then the first-person possessive -ım to mean 'my future finding'. This gives us nasıl bulacağım (how I will find).

Why is there an extra -ı at the very end of bulacağımı?

That final -ı is the accusative case suffix. The entire indirect question clause çıkışı nasıl bulacağımı acts as the specific direct object of the main verb tarif et (describe). Since you are asking someone to describe 'it', the clause needs the accusative marker.

Why does çıkış (exit) also have an accusative ending (çıkışı)?

Because it is the specific direct object of the action inside the clause. You are looking for 'the' exit, not just 'an' exit. Therefore, çıkış takes the accusative suffix -ı before the verb bul- (find).

I know tarif etmek means 'to describe'. Is it commonly used for giving directions?

Yes! While it literally translates to 'describe' or 'define', phrases like yol tarif etmek (to describe the way) or simply tarif etmek are the standard, natural way to ask someone to explain how to get somewhere in Turkish.