If you are transferring a Scout between units in the same council, use the instructions at this link (not the instructions below.)
Instructions for transferring from another council are below:
Scouts when registered in your council to your unit will automatically come into your unit in Scoutbook. The Scout will appear within 48 hours of appearing the Roster tool in my.scouting.org. We strongly advise that you wait for that to occur.
If the Scout is not moved over at registration or you would like to bring their Scoutbook records over from another unit that uses Scoutbook manually, you can use the Transfer Tool. This tool will bring over all their Scoutbook history from their previous unit.
This tool is available only to Scoutbook Unit Administrators
From the unit Roster page (My Dashboard > click on your unit > unit Roster) of the receiving unit, click on the Transfer In Scout button which you will find below the list of Scouts on your roster:
You will be prompted for
BSA Member Number: (this is the BSA member number the scout had in the old unit)
Zip Code: This is the one for the Scout’s old address (the address in Scoutbook).
And if you wish to place the Scout into a Den or Patrol
Then click Search
If Scoutbook finds the Scout, you will be asked to confirm and if you wish to remove the Scout from the previous unit or leave them there. (Scouts moving from a Pack to a Troop will always be removed in Scoutbook from the Pack.)
Then click Confirm
The Scout will then be moved into your unit. All their Scoutbook history will be there.
More information on transferring records from another council is here.