How many months prior one I can go for H1 stamping

Currently I am in canada and I got my h1 approved , I was going through various websites to find out the information on when or how many months prior i can go for h1- stamping

Thanks in Advance

You can go for stamping anytime.

Actually one can go for stamping at most 90 days prior to H-1 start date. So if H-1 starts on Oct 1, then it means after July 1.