Only Cashbook Connect customers and above have access to Debtor and Creditor invoicing, so you will need to check what level you purchased/leased. Do this by clicking on the Help/About Cashbook Platinum (or About Cashbook Plus!) menu option.
If you have purchased/leased the appropriate level:
Click on the Setup/Settings menu option
Click on the Modules tab
Make sure that both Activate Creditors and/or Activate Debtors are ticked, as appropriate to your situation
Click OK
If you believe you have purchased a higher level version of your Cashbook package or wish to upgrade, so you can access these options, please contact Practical Systems.
Article ID 431