Best Practices for State(s) Tax Ledger in Fixed Assets

Community,

 

My F/A tax people (CPA's) are asking me why keep separate Tax Ledgers for every State, we have Assets in?  Since some states, follow Federal tax rules?

 

 My only response is that these states at some point might diverge from Federal.     

 

Where can I find “Best Practices”  documentation on this subject and JDE World Fix Assets?