Zoho Books Create Invoice API

Zoho Books Create Invoice API

I am creating zoho invoices via the API.  Now that zoho has released sub-accounts, i'd like to create invoices and link them to sub-accounts within "sales" account.  

For example; my chart of accounts looks like this;

Sales
->Website Sales
   ->Campaign Sales
->Offline Sales

However, when I try to pass these accounts to the API, I receive an error that only Bank accounts can be passed with the create invoice.