Summary: Tax professionals recommend starting preparation months before filing season opens. Key actions include early document organization, reviewing updated OBBBA provisions, adjusting withholding, maximizing retirement and HSA contributions, and reconciling AIS data. A year-round approach reduces stress, prevents costly errors, and ensures you capture all eligible deductions and credits.
For most Americans, tax season is a stressful scramble that begins in January and culminates in a frantic April filing. But for tax professionals—the people who navigate the tax code daily—the most effective preparation happens long before the first W-2 arrives. “Tax return preparation is best treated as a year-round activity,” notes Mark Luscombe, principal analyst for Wolters Kluwer .
The 2026 tax season presents unique challenges and opportunities. Sweeping changes from the One Big Beautiful Bill Act (OBBBA) have reshaped deductions, credits, and filing requirements . The IRS opening day for filing 2025 returns is January 26, 2026, and the agency is phasing out paper refund checks in favor of direct deposit . Whether you’re a salaried employee, business owner, or retiree, the guidance from tax professionals offers a clear roadmap for a smoother filing season.
Start with Organization: The Foundation of Smooth Filing
Every tax professional interviewed emphasized a single principle: start early and get organized. Laurie Smith, tax partner at Wiss Private Client Advisors, recommends reviewing what you needed for last year’s return to create a checklist for this year . Better yet, create a dedicated digital folder for all tax-related documents.
What to Gather and Track
The IRS advises gathering key forms as they become available:
- W-2s from employers
- 1099s from banks, issuing agencies, and other payers, including unemployment compensation, dividends, pensions, and retirement distributions
- 1099-K or other income statements for gig economy work
- 1099-INT for interest income
- 1098 for mortgage interest
- K-1s for partnership or trust income
- Charitable contribution receipts
Brian Fine, CPA and partner at Alpine Mar, recommends creating “an accurate inventory of all the tax documents you expect to receive in early calendar year 2027” . This prevents scrambling when forms arrive and ensures nothing is missed.
Digital organization has become essential. “Keeping documents digitally whenever possible is best,” Fine explains. “This makes working with CPAs and completing your filings much easier and more streamlined” . Set up a dedicated email folder during the year to store auto-generated acknowledgments from charitable organizations, investment statements, and other tax-related correspondence.
Understand the New 2026 Tax Rules
The OBBBA has introduced significant changes that affect filing for the 2025 tax year (returns filed in 2026). Tax professionals stress the importance of understanding these changes well before filing season.
Key OBBBA Provisions for the 2025 Tax Year
- SALT Deduction Cap: Temporarily raised to $40,400 for 2026 ($20,400 for married filing separately), with phase-out beginning for those with modified adjusted gross income exceeding $505,000 .
- New Charitable Contribution Floor: A 0.5% floor for charitable contributions takes effect for the 2026 tax year, meaning itemizers must have charitable deductions exceed 0.5% of adjusted gross income before they can be claimed .
- Above-the-Line Charitable Deduction: Non-itemizers may now claim up to $1,000 for single filers ($2,000 for joint filers) in cash donations on top of the standard deduction .
- Retirement Contribution Limits: 401(k) contribution limits have increased to $24,500 for 2026, with catch-up contributions for those 50 and older .
- Senior Deduction: A new deduction of up to $6,000 per taxpayer over age 65 is available through 2028, subject to phase-out for those with modified adjusted gross income exceeding $75,000 ($150,000 for joint filers) .
Fine advises, “Individuals will want to consider this as they plan their charitable giving for the year” . Luscombe adds that “some of the changes, such as the new above-the-line charitable deduction for non-itemizers, might encourage non-itemizers to postpone charitable contributions to 2026” .
Adjust Withholding and Estimated Payments Early
One of the most overlooked steps is reviewing W-4 withholdings at the beginning of the year. “Increasing estimated tax payments on Jan. 15 can reduce possible underpayment of estimated tax penalties,” Luscombe says . If you had a large refund or owed a lot last year, ask why—and adjust accordingly .
For salaried employees, a common mistake is assuming that employer TDS will fully cover tax liability. “The ‘TDS will take care of my taxes’ approach no longer works,” warns O.P. Yadav, a former IRS officer with 36 years of tax experience .
For Salaried Employees: Using Form No. 122
Employees changing jobs or with multiple income sources should furnish Form No. 122 to their employer “at the earliest opportunity,” according to Yadav. This form enables employees to disclose salary from previous employers, other taxable income, TDS already deducted, and available exemptions and deductions .
Yadav also warns against overstating investment declarations on Form No. 124. “If those investments or eligible payments are ultimately not made, the resulting TDS recovery in the final quarter can significantly impact monthly cash flows” . Disclose only realistic and achievable claims.
The Self-Assessment Tax Risk
Many salaried taxpayers assume TDS already deducted means no additional tax liability. “That assumption is often incorrect because the final tax liability computed under the applicable slab rates may be significantly higher than the rate at which TDS was deducted on other incomes such as interest income and professional or freelance income,” Yadav explains .
When employees later compute their total income, the shortfall surfaces as self-assessment tax payable and interest liability for advance tax defaults. These situations “can be avoided for Tax Year 2026-27 if employees furnish relevant particulars in Form No. 122 at the earliest opportunity” .
Maximize Retirement and HSA Contributions
January is an ideal time to front-load contributions to IRA, 401(k), and HSA accounts, or create a monthly schedule . These moves reduce taxable income and give investments more time to grow.
Contributors to IRAs and 401(k) plans sometimes fail to think about additional catch-up contributions . Additionally, HSAs offer triple tax advantages: contributions are deductible, growth is tax-free, and qualified withdrawals aren’t taxed .
For Self-Employed: Clean Business Records Early
Freelancers and small-business owners benefit significantly from early bookkeeping hygiene. Luscombe urges taxpayers to ensure they have a good recordkeeping system and “a segregated bank account for the business…that keeps personal income and expenditures separate from business” .
Accuracy matters especially for self-employed individuals. Fine notes, “Run your business clean…work with a reputable tax professional to ensure your tax return presentation is accurate and does not present information in a fashion that could trigger unintended questioning” .
Avoid Common Filing Mistakes
The biggest audit triggers are basic errors, Luscombe explains: missing forms, mismatched income, incorrect Social Security numbers, or filing before everything arrives. “Take time to carefully review the accuracy of the tax return before filing” .
Digital Asset Reporting
Taxpayers who bought, sold, or received digital assets—including cryptocurrency, stablecoins, or NFTs—may be required to report those transactions. Some taxpayers may receive Form 1099-DA from brokers. Whether you receive a Form 1099-DA or not, all taxpayers must answer the digital asset question on Form 1040 and report any related income, gains, or losses .
ITIN Renewal
If a taxpayer’s ITIN wasn’t included on a U.S. federal tax return at least once for tax years 2022, 2023, and 2024, it would have expired on Dec. 31, 2025, and will need to be renewed .
Form 26AS and AIS Reconciliation
For taxpayers who receive Form 26AS or Annual Information Statements, waiting until mid-June to file a return is advisable. This allows financial institutions to report their quarterly TDS and Statement of Financial Transaction returns, ensuring the data in these statements is fully updated .
A mismatched return can trigger notices. “Differences between Form 16, AIS and Form 26AS may result in incorrect reporting and could trigger notices from the tax department” . Early reconciliation of income, deductions, and TDS ensures alignment before filing.
What Tax Professionals Recommend Before Filing Season
Early Document Organization
- Create a dedicated digital folder for tax documents
- Track W-2s, 1099s, 1098s, K-1s, and charitable receipts
- Set up an email folder for acknowledgments and statements
Understand 2025 Tax Law Changes
- Review OBBBA provisions affecting deductions, credits, and filing requirements
- Note the new 0.5% floor for charitable contributions
- Understand increased retirement contribution limits
Adjust Withholding and Estimated Payments
- Review W-4 withholdings early in the year
- Pay estimated taxes on time: April 15, June 15, September 15, January 15
- Use Form No. 122 to disclose all income sources to employer
Maximize Tax-Advantaged Contributions
- Front-load IRA, 401(k), and HSA contributions
- Consider catch-up contributions if eligible
- Track HSA-eligible expenses
Avoid Common Filing Mistakes
- Don’t file before receiving all forms
- Reconcile AIS and Form 26AS data
- Report digital asset transactions properly
- Renew ITINs if expired
For Self-Employed
- Maintain segregated business bank accounts
- Keep accurate records throughout the year
- Work with a reputable tax professional
Frequently Asked Questions
When does the 2026 tax filing season open?
January 26, 2026 is opening day for the 2026 tax filing season, when taxpayers can begin filing their 2025 federal tax returns .
What are the quarterly estimated tax payment due dates for 2026?
Estimated tax payments for income earned in 2026 are due April 15, June 15, September 15, 2026, and January 15, 2027 .
What is Form No. 122 and why is it important?
Form No. 122 is a voluntary disclosure form that employees can submit to employers to help them compute TDS more accurately. It allows employees to disclose salary from previous employers, other taxable income, TDS already deducted, and available exemptions and deductions. Using this form can help prevent unexpected tax liabilities .
Can I file my return without Form 16?
Yes, you can file without Form 16, but tax experts advise caution to avoid errors. Form 16 is an important reference document containing consolidated details of salary income, exemptions, deductions, and TDS deducted. Filing without it may lead to mismatches and delayed refunds .
What is the new charitable deduction floor for 2026?
A new 0.5% floor for charitable contributions is scheduled to take effect for the 2026 tax year. This means itemizers must have charitable deductions exceed 0.5% of adjusted gross income before they can be claimed .
How has the SALT deduction changed for 2026?
The SALT deduction cap was temporarily raised to $40,400 for 2026 ($20,400 for married filing separately), with phase-out beginning for those with modified adjusted gross income exceeding $505,000 .
What are the 401(k) contribution limits for 2026?
The IRS has increased the amount taxpayers can pay into their 401(k) plans to $24,500 for 2026, up from $23,500 for 2025. Catch-up contributions for those 50 and older are also available .
Why should I wait until mid-June to file my return?
Waiting until mid-June allows banks and financial institutions to complete their quarterly TDS and Statement of Financial Transaction returns, ensuring Form 26AS and the Annual Information Statement are fully updated .
What is the best way to handle charitable giving for tax purposes?
Tax professionals recommend planning charitable giving strategically, especially with the new 0.5% floor. Consider bunching donations into a single year to exceed the standard deduction, and keep digital receipts for documentation .
The Professional’s Perspective: Lessons from the Trenches
Tax professionals consistently emphasize that the key to a smooth filing season is treating taxes as a year-round process, not a once-a-year scramble . The most effective actions happen months before filing season opens.
For salaried employees, this means submitting Form No. 122 early, avoiding overstating investment declarations, and periodically estimating total annual income before advance tax due dates . For business owners, it means maintaining segregated accounts, accurate records, and working with reputable tax professionals . For all taxpayers, it means staying informed about tax law changes, tracking digital asset transactions, and ensuring ITINs and personal information are current.
The firms having smooth tax seasons have stopped treating this like a four-month sprint. They’re running year-round operations where books stay current, clients upload documents as they arrive, and tax planning conversations happen quarterly—not in a panic on April 10th .
As Smith emphasizes, it’s a lot easier if you keep records from the beginning of the year “versus trying to recreate and remember expenses” . Luscombe puts it simply: “January shouldn’t be the only month you think about taxes” .
Key Reflections
- Start tax preparation months before filing season opens. Organization and early action are the foundation of a smooth filing experience.
- The OBBBA has reshaped the tax landscape. Understanding new provisions—including SALT cap changes, charitable deduction floors, and retirement contribution limits—is essential.
- Salaried employees should submit Form No. 122 early. Disclosing all income sources and available deductions helps employers compute accurate TDS and prevent unexpected liabilities.
- Review withholding and estimated payments. Adjusting early prevents surprises and underpayment penalties.
- Maximize tax-advantaged accounts. Front-loading retirement and HSA contributions reduces taxable income and builds long-term savings.
- Reconcile AIS and Form 26AS data before filing. Mismatches can trigger notices and delays.
- The most effective tax planning is year-round. Treat filing season as a checkpoint, not a starting point.
Leave a Reply