Question: "How do you know when to use or not use punctuation in poetry

Hi,
I am brand new here. I just discovered the site.
My questions are in regards to writing story poetry. 

1.How do you know when to use on not use punctuation in story          

2. how to determine where the proper stanza break should be in this type of poetry. What are the rules if there are any no one seems to know for sure.

3. Is there a set number of syllables that should be used per line is there a set limit? if so what is it?

In poetry, punctuation can be used just as in narratives. One would place commas using the same rules for commas and periods after a sentence or complete thought. However, poets often break the rules of grammar (they're notorious for breaking the rules  ) and use creative license, inserting commas, periods, and other punctuation where it feels right. 

As for stanza breaks and and how many syllables to use per line, this too is subjective. Free style poets, again, go by feel. It all depends upon the subject matter and the feeling they are trying to convey. On the other hand, there are some styles in poetry that have a strict structure to follow depending upon the type of poem. There are countless types of poems. Here's a great website that describes several types: Types of Poems

Also, here's a great website to just learn some of the basics of poetry: Glossary of Poetic Terms