Each tax program uses its own proprietary software to scan for deductions and credits. They also have their own approaches to asking you questions and soliciting answers. Because of this, you may find your tax refund differs from one program to the next. Each program has a refund guarantee, though, and will refund what you paid for the program if another method provides a larger refund. TaxAct also refunds you up to $100,000 if your refund was smaller than it could have been.