I did this, perhaps thirty years ago (rocking a flatbed in the 90s #ROFL)... for about two years. Then decided that OCR was terrible. I revisited on a multifunction copier, mid-00s — to the same conclusion.

Once this can be run entirely offline, with simple github installer [0]... I'll be scanning again. This definitely "reminesced a nerve" that "took me back..."

Unfortunately not looking good for accountants, among others...

[0] I'd recon the majority would use a cloud-based, off-device processing — they just selfie each receipt

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Ten years ago I still used a smartphone; when the banks started allowing mobile deposit, was a very Trekkie day for me...