first of all 

"When importing an invoice CSV file in QuickBooks online, please note that the platform is only import data fields that are mapped within the CSV file," 

this is incorrect! i named all my columns correctly even did upper case and lower case letters as you they were on quickbooks mapping, yet it was trying to pull my order numbers which id set to "Sales Record No" as dates!! example order number 20-13182-17395

why?? the column is mapped for "sales record number" so why is it not treating it as that? 

secondly its saying "order" is not a valid name for item of course it is! its either order, payout or postage cost


thirdly 
"As an alternative, you can consider using the eBay connector. This third party application can automatically import your sales transactions and payment from eBay into QuickBooks."

if it only worked correctly!!! it only pulls a few days backwards of data no matter what date you set it to in the past for me 20/03/2025. been through troubleshooting with the app people and quickbooks over the course of 2 weeks and they still havent fixed it. 

finally if things worked as they should i wouldnt need to be messing about with spreadsheets trying to fix stuff that shouldnt need fixing!! 

I find it absolutely disgusting that quickbooks are not aligned with the major platforms for selling. quickbooks should be aligned with bare minimum of amazon ebay and shopify and then maybe woocommerce too. but you are not at all aligned. 

i see no reason why you cant add in your software an import system for each of these platforms that actually accepts each platforms csv file then aligns it to what quickbooks automatically. so then a customer like me could click on lets say "i am importing from ebay" here are the colums from ebay that we will use then here are the colums that they will be put into on quickbooks so you know where they are going. i really doubt it would be difficult to impliment. All you need to do is keep uoto date with ebay's column names very simple.

quickbooks is supposed to be just that but its a shambles and the apps dont do what you need them to do. i tried 4 of your chuffing third party apps which you dont actually support!!! and the app people dont really give a toss either making you wait for weeks only for nothing to be fixed!