How to turn PayByCoin on
You can turn PayByCoin on and off right from QuickBooks. Click Gear > QuickBooks Labs and turn on PayByCoin.
Click Gear > Company Settings > PayByCoin to link to a Bitcoin payment processor.
How PayByCoin works
When you email your customer an invoice, their online payment screen shows the option to pay by Bitcoin:
Your customer then reviews and sends their Bitcoin payment:
And finally, your customer receives a payment confirmation: