You can store and keep paper records digitally. The ATO accepts images of business paper records saved on a digital storage device, provided the digital copies are true and clear reproductions of the original paper records and meet the 5 rules for record-keeping. 

Once you’ve saved an image of your original paper records, you don’t have to keep the paper versions. 

Creating a digital version of paper EFTPOS merchant receipts is a good practice as the details on some of these can fade over time.