I understand what you're explaining but it isn't very practical.

To give an example I have one customer with 8 invoices with 2-10 finance charges (85 total).  These are all from a customer that is dealing with USAA home insurance and battling for over a year on getting storm/water damage repairs paid for.  After more than a year of waiting on invoices we mutually agreed to financing rather than home owner refinancing to make up insurance shortfall. 

In the state of Washington we're supposed to report finance charges and income that is considered "Financing fees, penalties and interest"

Charges for interest, late payments or penalties are subject to the B&O tax under the service and other activities classification.

References: WAC 458-20-109, WAC 458-20-211

The B&O tax is supposed to be filed monthly from "income" from the previous month. 

Looking at similar posts I see this type of conflict with Invoice Date and Service Date isn't uncommon... 

https://quickbooks.intuit.com/learn-support/en-us/reports-and-accounting/invoice-date-service-date/0...

Trying to figure out how to fix this without having to add complexity to customers who have chosen financing options but I can't retro actively recognize interest income.    Since I started the offer of financing in June of 2022 I need to figure this out for before filing federal taxes too.