Intuit has a merchant account processor that integrates with QuickBooks. I sell it off my website, which is www.radicalaccounting.com. If you put in your order through my web site, you get a free copy of QuickBooks Pro software with your order.
I'm going to tell you the good and bad of having this merchant account.
The good news is that they approve anyone and everyone. I was approved in 1 day. I didn't have to submit a P&L or tax return, which was a good thing at the time, ha, ha.
More good news is that their rates are lower than anyone, including Costco, last time I checked. But please check for yourself.
More good news is that it integrates with QuickBooks, which is truly awesome.
And they offer a variety of features, like card reader, no card reader, virtual terminal, etc.
Recently they lowered my processing rates for being a "good customer".
The bad news is that their customer service is not up to my standards, so if you have a problem, it can be frustrating or even impossible to solve. I've had clients with problems, and I've had problems, and we still use them anyway, because we believe the benefits outweigh the disadvantages.
For example, one client had a big problem with a foreign transaction that was fraud and he couldn't get credit. IMS handled it badly. He does .5M a year with them. I thought he might change over this, but he just loves the QuickBooks integration. He does a fair number of credit returns, because he has this battery thing that you can buy and return, and he'll recharge it, and the credit returns are integrated too, so he loves the ease of use. He said his lesson wasn't to change merchant accounts, but that foreign transactions are wire transfer only from that day forward.