Gross Revenue?

Hi,

 

When is the gross revenue from my business mine for personal use?  So far I have only spent money on supplies etc but at some point I expect to sell items and for that to cover the expenses.  In theory I will have money left over.  My thought was to put most of that back into the business for more supplies etc.  But can I take some for myself? Is there a formula for this or a document that has to be filled out to track the money?

 

Thank you,

Daria