I tried to be creative and get that TIPS information to import onto the sales receipt. I checked the option for 'items in multiple columns" under ecommerce options as suggested, then chose Item 2 to be the TIPS column. It created an inventory item for each value of tip (15, 3.48, 24, etc) So I then set Item 2 to be a stagnant field called TIPS which is our QB item for the tips collected and mapped the PRICE of Item # 2 to the column TIP. It pulled in the amount as the RATE but with no quantity, the net was still ZERO.
At this point I have hijacked Online Handling and I have my TIPS column mapping to that, and I edited the ITEM Online Handling to map to my Taps Payable liability GL acct.
Do you have a better solution?