1. QuickBooks Online: Intuit only. You sign up directly on Intuit's site or through its mobile apps. There's no box on a shelf and no reseller license key; every QuickBooks Online subscription is billed directly by Intuit, month to month or annually.
2. QuickBooks Desktop: Intuit, plus authorized resellers. You can buy Desktop directly from Intuit's website, or through retailers and resellers that carry it, big-box stores, office supply chains, and online marketplaces like Amazon. The product is identical either way; the difference is just who processes the purchase.
3. Check whether a reseller listing is current. Desktop retail listings sometimes lag behind Intuit's own lineup, an older version still for sale after Intuit has moved on, or a listing that doesn't make clear which Desktop edition (Pro, Premier, Enterprise) is actually included.
4. Confirm it's a subscription, not a one-time purchase. Intuit phased out most one-time perpetual licenses for new Desktop purchases; most new Desktop products today are sold as an annual subscription that needs renewing to keep working, not a buy-it-once license. This applies whether you buy from Intuit or a reseller.
5. For an existing business already on QuickBooks, check with your accountant first. If a bookkeeper or accountant manages your file, they may have access to a wholesale pricing program through Intuit's accountant channel that isn't available buying retail, worth asking about before you purchase anything yourself.