There is the long running joke about the business owner who "files" their receipts in a shoebox. We laugh about it, but while technology is continuing to automate business some entrepreneurs still stash receipts to worry about later.
What I find far more common among online entrepreneurs is not gathering receipts at all.
Why is this the case? Online entrepreneurs have a lot of online expenses and some of these online providers don't send receipts out. That means the already swamped entrepreneur has to go sign into all of their accounts and manually pull these receipts and save them or in most cases they just don't do it all.