Hello there, @BenTCM.
I can see here how important to import style for sales receipts for your business. However, currently, we only have an option to import custom forms for invoices and estimates.
I suggest using a third-party app that you can integrate with QuickBooks to import styles for sales receipts. You can also visit our QuickBooks Blog for new updates and releases.
You'll want to personalize your sales forms. Feel free to check out this reference: Customize invoices, estimates, and sales receipts in QuickBooks Online.
Please let me know if you have additional concerns. I'm here to help you. Have a great day.
