You can start from this basic report and add the tables/fields you like.
Select tblComputers.Computername, tblComputers.ComputerUnique,
  tblComputers.Domain, tblADComputers.OU, tblComputers.LastknownIP
From tblComputers Inner Join
  tblADComputers On tblComputers.Computername = tblADComputers.Computername
Where tblADComputers.OU = 'your OU name'