Since you only have 1099 income, this is likely something in the Business section in your income and expenses. Maybe a mark that you intended to contribute to a SEP or 401k or something like that? That would be where I would look next.
And just as an aside - if you don't already have a SEP, they are as simple to set up as most regular IRAs and if you had a good deal of profit in your business you can put in more money (and it is a better tax deduction even if you don't put in more) with this type of plan. My favorite thing about them, though, is that if you file an extension for your return (even if you file the return the very next day) you have until 10/15 to fund it. So you can lower your tax bill by promising to put $X in your SEP by 10/15 - sometimes it works out so you get a refund and can use that refund in part to fund it. If for any reason you don't make the contribution in time, you amend the return and pay more tax so you have to be careful but it's a great deal. 25% of your net profit (adjusted down for the contribution itself so it's not a pure 25%) and it saves SE and income tax and max contribution is $58,000 (if profit supports a contribution that high).
Anyway, I would revisit the retirement plans section under the Business part(s) of the program.
