Tax season is stressful enough, but avoidable mistakes can turn a routine filing into an expensive headache.

With Tax Day just 10 days away, even small errors can mean the difference between a smooth refund and frustrating delays. In some cases, they can even trigger IRS notices or unexpected penalties.

Here are five common filing missteps to watch out for and how to avoid them:

1. Choosing the wrong filing status

Your filing status is one of the most important choices on your tax return because it helps determine your tax rate, your standard deduction and which credits you may be eligible to claim. Pick the wrong one, and you could end up paying more than you owe, getting a smaller refund or triggering delays if the IRS flags the return for review.

For many taxpayers, the confusion comes from life changes that happened during the year, like getting married or divorced, having a child, moving in with a partner, supporting an aging parent or sharing custody. Even if your situation feels straightforward, the IRS rules can be less intuitive, especially for taxpayers who aren’t sure whether they qualify as “head of household” or whether they can still file as “qualifying surviving spouse” after a spouse has died.

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Head of household, in particular, can be costly to get wrong. It typically comes with a larger standard deduction and more favorable tax brackets than filing as single – but it has strict requirements tied to paying more than half the cost of keeping up a home and having a qualifying dependent. If you don’t meet the rules and claim it anyway, you may have to pay back tax benefits later, plus penalties and interest.

When in doubt, the IRS has an online filing-status tool, and many tax software programs will walk you through the questions to help you choose the right category.

2. Leaving credits on the table

One of the biggest and most expensive tax-season mistakes is failing to claim every credit or deduction you qualify for. That can mean a smaller refund or a higher bill.

“I think the top mistake people make is not fully understanding or taking the time to really research what are all the different deductions and the ways that you can put a little bit of extra money in your pocket that are available to you,” said Bill Sweeney, senior vice president of government affairs at AARP.

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Sweeney also warned taxpayers not to rely on last year’s return as a blueprint for filing because of recent changes to the tax code from the One Big Beautiful Bill Act. 

“This would be a good year given that there are these changes to the tax code, to make sure not to assume that what you did last year will convey over to this year. Really take a fresh look at your tax situation and see if there’s money that you’re leaving on the table,” he said.

3. Missing key deadlines

An extension can buy you time to file your paperwork, but it doesn’t give you extra time to pay. For most taxpayers, the IRS deadline to pay what you owe is April 15, 2026 – even if you request an extension to file later.

“Remember that even if you claim an extension, the money is owed on April 15,” said Mike Faulkender, co-chair of American Prosperity at the America First Policy Institute.

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Faulkender, a former Treasury official and IRS commissioner, said taxpayers who need more time should still estimate their bill and pay by the filing deadline to help avoid added costs.

“You have to actually send in a check or have the payment deducted from your account by the filing deadline,” he said.

If you can’t pay in full by April 15, pay what you can to help limit penalties and interest on top of your tax bill.

4. Entering bank account details incorrectly

If you choose direct deposit for your refund, the IRS relies on the routing and account numbers you provide. One wrong digit can lead to delays. 

If you pay what you owe by direct debit, incorrect banking details can also lead to a rejected payment and potentially result in penalties and interest.

5. Filing before all your tax forms arrive

Timing matters when it comes to filing your taxes. Submitting your return before you’ve received all your key paperwork, like W-2s or 1099s, can lead to errors, missing income or a return you have to amend later.

Faulkender said there’s a simple way to double-check what’s been reported under your name before you file. 

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“One of the things that I learned last year when I was IRS commissioner, was that if you create an account on irs.gov, you can see everything that’s been filed under your tax ID,” he said. 

“We’re supposed to receive all of our W-2s and our 1099 forms in the mail in January and February. But if you’re missing one, or you misplaced it rather than requesting it again, you can actually go and see what was filed under your taxpayer identification number if you create an account on IRS.gov.” 

Filing late can also cost you extra money, especially if you owe. The goal is to wait until you have what you need, then file as soon as you’re ready.

WASHINGTON — Merely two weeks had passed since the Iran war began when Gen. Randy George, the Army’s highest-ranking officer, began sounding an alarm.

Touring a weapons depot in North Carolina, George warned lawmakers present that the conflict’s vast and ever-growing list of targets was straining U.S. capacity — “depleting our stockpiles faster than we can replace them,” as one congressman recalled. Since assuming Army leadership, George had made it his mission to strengthen the nation’s industrial base in anticipation of precisely this moment, when the United States would be engaged in a major war with a formidable adversary.

On Thursday, in a brief phone call, Defense Secretary Pete Hegseth fired George. No reason was given, a U.S. official familiar with the matter told The Times.

The forced departure of George in the middle of a war created yet another blow to morale inside the Pentagon, where multiple officials expressed dismay over the state of the department’s leadership. Over the last year, Hegseth has fired five sitting members of the joint chiefs of staff, with only two holdovers remaining in their posts.

“Whenever you have a change in leadership, military or otherwise, there is bound to be some churn in information management,” one U.S. official said, granted anonymity to speak candidly. “So what you’re doing, in the middle of a war, as we are taking U.S. casualties, is you’re taking out the general in charge of making sure the right people and equipment are flowing into the Middle East.”

Inside the building, officials believe that Hegseth’s next target is Dan Driscoll, the Army secretary and an ally to President Trump. Driscoll has been seen by Hegseth’s aides as outshining the Defense secretary on prominent policy initiatives.

It is a purge that Republican lawmakers on Capitol Hill fear could have tangible, detrimental effects on the war effort. Sens. Roger Wicker of Mississippi, Tom Cotton of Arkansas and Joni Ernst of Iowa, all members of the Senate Armed Services Committee, have expressed private concerns over George’s firing, a second U.S. official said.

Forcing out Army leadership responsible for training and equipping its soldiers, and for ensuring weapons stockpiles continue to meet demand, risks bureaucratic chaos and despair in the ranks at a time when the Trump administration is openly considering a ground operation in Iran.

Others in the Pentagon have raised concern over the U.S. military stockpile, including Air Force Secretary Troy Meink, who last month warned at a defense conference that munitions shortages were a concern even before the war began.

“It was something that we were concerned about even before the operation,” Meink said. “It has just been the fact that we couldn’t see the threat evolving and what we’re facing. So we definitely have to improve on that.”

Trump has denied that the United States faces weapons shortages, even after meeting with the nation’s top contractors last month in a push for them to increase — and on some products, quadruple — their output.

“What interceptors we have for Iran is because of Randy George,” the first U.S. official countered. “He continued to work that problem set up through [Thursday]. It’s a problem set he was working in real time.”

Jerry McGinn, director of the Center for the Industrial Base at the Center for Strategic and International Studies, said U.S. forces have reached a stage in the war where they can pivot away from standoff weapons systems. With Iran’s air defenses largely degraded, they can instead rely on weapons such as laser-guided bombs, helping ease pressure on stockpiles.

But Iran’s downing of two U.S. aircraft on Friday suggests that longer-range weapons may still be necessary.

“When the stockpile is stressed, as it was after Ukraine and then now with Iran, any surge in need leads to a backlog as they try to replenish,” McGinn said.

“The three things they’ve been using a whole lot of are Tomahawks, [Terminal High Altitude Area Defense] and Patriots, and those inventories were already somewhat depleted after Midnight Hammer last summer,” McGinn added. “You can’t crank those out very fast.”

Beyond his role tending to the nation’s “magazine depth” — making sure the military isn’t firing more weapons than it is able to replenish — George also led the Pentagon’s effort to set up a joint task force last year aimed at speeding up the U.S. military’s ability to counter small unmanned aircraft systems, or drones.

The program has proved critical in the war effort. Tehran now relies heavily on its Shahed drones, with its missile production and launch capacity severely diminished.

Acknowledging the Pentagon expulsions, Iran’s embassy in South Africa posted photos on social media Friday x-ing out portraits of several top U.S. military officials fired in recent months.

“Regime change happened successfully,” the Iranians wrote.

House Democrats will hold a pair of “shadow hearings” in California next week on the upcoming midterm elections — part of a broader party effort to defend state voting systems against mounting critiques and threats of intervention from the Trump administration.

Such hearings, similar to those recently held in Los Angeles on President Trump’s immigration raids, provide Democrats an opportunity to highlight issues their majority Republican counterparts won’t schedule for more formal hearings in Washington.

The hearings — scheduled for Los Angeles on Tuesday and San Francisco on Thursday — will feature testimony from voting and elections experts, and will be led by Rep. Joseph Morelle of New York, ranking Democrat on the House Administration Committee with oversight of elections, and Rep. Nancy Pelosi (D-San Francisco), the former House speaker.

Morelle, in a statement to The Times, said, “Democracy’s defenses are under attack” and must be defended.

“We will not let President Trump and House Republicans’ efforts to take over our elections prevail. We’re going to use every tool in our toolbox and that includes working with pro-democracy allies in communities across the country,” he said. “I look forward to hearing about the work being done in California to protect democracy as we fight on the ground and in Congress.”

Pelosi, in her own statement to The Times, said protecting democracy “demands vigilance, transparency, and action,” and the shadow hearings “will bring together voices on the front lines of election security, voting rights, and accountability to ensure that every American’s vote is protected and every institution earns the public’s trust.”

“At a time of rampant threats to our democratic system, we must strengthen and defend the integrity of our elections to reaffirm that our government is of, by, and for the people,” she said.

Rep. Pete Aguilar (D-Redlands), chair of the Democratic Caucus, and other Democrats from California are also expected to attend. Republican members of Congress are not expected to be there.

The hearings will be the first in a while to be led — at least in part — by Pelosi, 86, who gave up her position in party leadership and does not currently hold any committee assignments. She announced in November that she will not seek reelection.

Trump has alleged for years, without evidence, that U.S. elections are undermined and swayed by widespread voter fraud, and that such fraud cost him the 2020 election that he lost to Joe Biden. He and his personal attorneys have repeatedly argued as much in court, but always lost — in part because they could never produce any evidence to back their claims.

Since retaking the White House last year, Trump has continued pushing his baseless claims, and pushed his administration to attack voting systems — particularly in blue states where he has been unpopular.

In September, Trump loyalists in the Justice Department sued California and other states for their voter rolls and other sensitive voter information, but were pushed back by the courts.

In January, the FBI raided and seized 2020 election records from an elections office in Fulton County, Ga., that was the subject of Trump’s allegations of voter fraud in 2020.

In February, Trump said Republicans should “take over the voting in at least 15 places,” alleging that voting irregularities in what he called “crooked states” are hurting his party. “The Republicans ought to nationalize the voting.”

This week, Trump issued an executive order purporting to give federal agencies control over ballot processing by the U.S. Postal Service.

Trump administration officials and allies have also raised concerns that they might send immigration agents to polling locations during the midterms, in part by refusing to rule out such a move in the wake of mass deployments of such agents into American cities to pursue Trump’s mass deportation agenda.

Trump has framed his efforts to end voting by mail — which he recently did himself — and increase voter identification requirements as “common sense” steps to combat fraud that most Americans agree with. A vast majority of California voters cast ballots by mail, including nearly 90% in last year’s special election on Proposition 50, the state’s mid-decade redistricting measure.

Democrats and many elections experts have rejected Trump’s election claims as baseless, defended state-run systems as safe and secure, and said his demands for stricter voter ID regulations would disenfranchise millions of U.S. citizen voters who lack the sort of documents he wants to mandate — including women who changed their name in marriage.

Voting experts say fraudulent votes, including by noncitizens, are rare, and that there is no evidence that fraud swings U.S. elections.

States including California have joined voting rights organizations in suing to block Trump’s various attempts to intervene in state-run elections, including his order last week and a previous one purporting to place new federal requirements on voter identification and proof of citizenship.

California officials and others have repeatedly noted that federal law gives states the right to administer elections as they see fit, and promised to fight any attempts by the president or his administration to infringe on state election powers.

Local elections officials in California have also been preparing for potential election day interruptions from the Trump administration.

Scheduled to participate in the hearings were experts from the UCLA Voting Rights Project, Loyola Law School, the League of Women Voters of California, Common Cause California, and the Mexican American Legal Defense and Educational Fund, or MALDEF.