If you start smoking at a young age, when the vocal cords are not strong enough, then the voice can "sit down". If mature, then it probably will not affect the voice. For example, my voice did not change, although they say that smoking affects women more.
It's all individual, smoking affects everyone differently. For some, a month of smoking is enough for their voice to begin to "sag", and for some heavy smokers, their voice may not change in their entire life.
without mats, without bad words, I smoke and drink, I am healthy