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A dozen tax mistakes not to make

April 9, 2007

There’s nothing like taxes to showcase our fallibility. Sometimes we make big mistakes, like miscalculating how much tax we owe. On rare occasions, the IRS sends us money we didn’t properly claim. I’ve been on both sides of this tax equation, and while getting is definitely better than giving, the best move is to get it right the first time.

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Other times the mistakes seem small, like forgetting to come back and plug in your kids’ Social Security numbers. But without those, the IRS won’t give you any child-related tax breaks you might be trying to claim.

This year, trying to send in a perfect 1040 is harder than ever, since several tax breaks were approved too late to be included in the forms or instructions (you remember the December extenders, right?).

So to help you maneuver around all these potential filing pitfalls, take a look at this quick list of common errors:

1. Ignoring the federal phone tax refund
2. Forgetting about those aforementioned extenders (sales tax, tuition/fees and educators’ out-of-pocket costs)
3. Messing up your direct deposit account info
4. Claiming the wrong hybrid credit amount
5. Improperly valuing charitable donations
6. Forgetting that the kiddie tax has grown up
7. Overlooking interest income
8. Making math mistakes
9. Leaving off Social Security numbers
10. Ignoring IRS-provided paperwork
11. Forgetting to sign your 1040
12. Missing the deadline to file or request an extension

You can get more details on each of these errors by checking out this story.

And that’s just a dozen errors. Other lists of potential problems can be found at:

Y’all be careful out there!

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TO WRAP UP 2026

It’s over! With October’s extended filing deadline behind us, it is now time to focus on year-end moves to reduce your 2026 tax bill. 

You’ll find ways to do just that on the Tax Tips page (see the More Tax Posts drop-down menu at the top of the blog), as well as the separate tax tip pages for each month, notably October through December. If you’re on the Tax Tips page, you’ll find a monthly list at the end of this column. If you’re on another blog page, you can head straight to the October tips; at the bottom of that tips page you’ll find links to all the other 11 months’ collections of tax advice.

Not to spoil what you’ll find in that tax advice, but it does cover such things as tax deductions for charitable donations, investment moves that could reduce tax due, and ways to max out your tax-favored retirement savings. 

Finally, as the year winds down, things get hectic. There are lots of other things to occupy our time, like the much more fun upcoming holidays. But don’t lose sight of taxes, since timing is key. To be of use, most tax moves must be made by the end of the tax year. That’s Thursday, Dec. 31, which also is the last business day of the year. 

So that you don’t miss that final tax year deadline, also keep an eye on the countdown clock below. It will keep you on top of just how much time is left to make important, tax-saving moves. (Note: I’m in the Central Time Zone, so adjust accordingly for where you live.)

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