I am looking into migrating my data to Zoho Books. Currently using Zoho. My question is how to old customers and vendors opening balances along with their invoices with all line items? I have gone through the documentation and it doesn't make it clear on how this task can be done. I can see that I can import the balances but that is the total balance.

Example:

Client A - Outstanding Balance $500, split over 3 invoices.

Vendor A - Outstanding Balance $500, split over 2 invoices.

I want to import the old invoice and bill. Once imported this amount would show up in opening balance and the invoice/bill would also be there that will show the outstanding.

Anyone has any guide or links that I can follow to read up on this?