My guess...they use quickbooks in the background, which allows you to upload receipts. If the description of your amazon receipt looks like furniture, then they'll mark it as such...if it looks like office supplies...office supplies.
I use Wave, which lets you upload receipts and it will perform OCR to extract vendor info, date, total cost. It's not much of a leap to go 1 step further and look at the line items and categorize...again just a guess.
I use Wave, which lets you upload receipts and it will perform OCR to extract vendor info, date, total cost. It's not much of a leap to go 1 step further and look at the line items and categorize...again just a guess.