3. Math errors
A calculation of your financial situation based on a number of factors is actually a complicated formula behind tax forms. “Add line 8 to line 32 and multiply by.356 if your AGI is greater than $50,000.”
You should save yourself a lot of time and energy and use tax preparation software that does the calculations for you. With TaxAct, all you have to do is answer a few simple questions, and the software will populate the numbers in the appropriate box on your return.