Explanation/Reference:
Explanation:
Oracle Fusion Receivables uses the application rule set assigned to the transaction type of the debit item to determine how to reduce the open line, tax, freight, and late charge amounts for both receipt and on- account credit memo applications. If there is no application rule set assigned to the transaction type, Receivables uses the application rule set assigned to system options.
An application rule set uses these application rules:
Line First - Tax After: Apply to the open line item amount first. Apply any remaining amount in the

following order: tax, freight, and then late charges.
Line and Tax Prorate: Apply a proportionate amount to the open line item amount and the open tax

amount for each line. Apply any remaining amount to freight and then to late charges.
Prorate All: Apply a proportionate amount to the line, tax, freight, and late charges.

References: https://docs.oracle.com/cloud/farel8/financialscs_gs/FAOFC/F1113010AN18821.htm