I'm going to throw a wrench into this Q&A series on multiple AR usage. I've been on the phone with QB support for an hour and a half and have no answer or resolve. My client on QB Online, has two Accounts Receivable accounts that they use to bill customers - and yes when they bill using a particular Product/Service code, it bills to each independent AR, which QB online tells you it CAN NOT do. So my question is how is this happening? Where is the default AR being stored (not under the chart of accounts)? The credit default can be found under the Product/Service code, but where is the default debit code for the AR in QB? Theoretically, it could have been attached to a Product/Service code decades ago when this client used QB Desktop and it moved with the data to QB online decades ago, I assume, but then I would expect all bills to be consistently applied based on the product code, which is not the case. Additionally, in other client migrations from desktop to online - this has never been the case, one can only bill to one AR.  It further asks the question: why hasn't QB Online included the multi-AR functionality in their updates over the past decades, as I've seen countless requests for this functionality posted here? Would love any insight on why QB Online is acting this way and where the default AR resides in the software.