Migration of Corp Book and Tax Book

Hi,

During new Implementation we are in process of Migrating Corp Book in Jan-17 first open period with Asset balances as of 31-Dec-16

Do we need to manually  Migrate Tax Book Assets (for above Corp Book) as well OR through Initial Mass Copy the assets will automatically migrate to Tax Book from Corp Book in Jan-17

Or are we supposed to close the FA period for Jan-17 and then run Initial Mass copy or manually migrate Tax Book assets?

Please clear the above 2 doubts.

Rgds

Raju