Effects of migration,from TAXINJ to TAXINN

Dear All,

My client wants to migrate tax procedure from TAXINJ from TAXINN, can you please explain, what would be the effects or implications on current sales process. I knew the configuration part but I would like to know the effects of migration on current database, should I change the current pricing procedures(name of the pricing procedures). and condition types(name) please suggest me.

Thanks,

Reddy