Biggest Refund When you do a side-by-side comparison of your return in eSmart Tax versus the same return anywhere else, you will more than likely get the largest refund when you use eSmart Tax. If you don't, we will eat the tax preparation fees. Price Guarantee Sign up for your eSmart Tax account today and pay today’s rate, regardless of when you finish. Your price is guaranteed. 100% Accuracy If our math is off and it results in penalties or interest from the IRS, we will reimburse you the amount of those penalties and interest. Satisfaction Guarantee Get the answers you need when you need them and view tax advice on the topics you want to see. Your tax experience, your way, or your money back.