You seem to have a number of posts asking about training so I am just curious, what kind of training or experience do you currently have?  When folks ask for help here, it is helpful to know how experienced that person is in order to try and point them in the right direction.

First you need to be able to fully understand the instructions for the form and be able to actually do the form on a hunk of paper like we did before tax software existed.

Here is one source of understanding the form and the site is a good source for free or reasonably priced CPE. https://www.cpaacademy.org/search_webinar?search_box=3115&field_of_study=&professional_designation=&...

It is very helpful info. Thank you for your valuable sharing and input here. 

Form 3115 - Correcting Depreciation Line-by-Line | Brass Tax Presentations

This one is worth the price of admission.