QB ? - I use sales receipts to account for my cash register transactions. How do I enter the different payment types?

Create Payment Type Items and then link them to the appropriate bank account. You then use these items on your sales receipt to record the payments so your sales receipt is zero. You can also create an over/short item to account for discrepancies. Go to Lists>Item Lists and press Ctrl+N to bring up the new item dialogue box. See pictures below, click to enlarge.