Good day. 

I am trying to add multiple invoices to my customer account invoice. 

I have read many tutorials and what i get is creating them from the interface(clicking and putting ids,etc). 

I think this method is not well suited for me as if i have to test anything on my local deployment, will have to follow same procedure when deploying it to where its to be used. 

I wish someone help me(point me to a tutorial) on how i can create multiple reports

I have read these tutorials that involve using the developer mode.

http://odoo.guide/multiple-report-layout-step-by-step/#comment-224

https://www.askmpa.com/creating-multiple-invoice-templates-in-odoo-v8/

General report, https://www.odoo.com/documentation/8.0/reference/reports.html

Thanks for yor help