I want to create an iFlow to register vendor invoice.

[nanamishiono]

I want to create an iFlow to register vendor invoice.
The simplest case with one line of records to read and one credit and one debit account was successful.
However, we would like to support complex cases. For example, there are multiple accounts. For example, a journal entry using 63001000 and 63002000 for G/L Account on the debit side and 21100000 for the credit side. And there are multiple tax rates, each of which is calculated.

Example:

Example of records to be read:

There is one header line, one line for 63001000 and one line for 63002000.

I am having trouble creating an iFlow for such a case. I'm looking for samples or articles that might give me some hints, so if you know of any, please let me know.