We have been using the 2013 Desktop version which is out of support because of an old process that created our import IIF. We are developing a new process and have purchased 2023 Desktop. When I import the new IIF into 2013, it imports our Service Items properly into QuickBooks - but when I take the same IIF file and import into 2023, the Items are missing from the Invoice transactions as it is only recognizing Items and not Services in the import process. Looking at the IIF Import Kit templates, I see there are two example files for Invoices. We have been using Sales Tax Preference=off. In the Sales Tax Preference=on IIF template I see a section for INVITEM, but I do not understand if this is just referencing existing Items in our QB file, or if it is adding new INVITEMs. I need to somehow get the import in 2023 Desktop to recognize our existing Service Items as I don't want to add duplicate records. Any help appreciated.