Resolving common 2026 taxpayer issues and IRS notices

Resolving IRS Notices in 2026: What Taxpayers Need to Know

Tax professional reviewing IRS transcripts, extension filings and balance-due returns to prevent notices and resolve late-season tax issues

As April 15 draws near, tax professionals are seeing familiar late-season patterns of mismatched income on transcripts, a surge in extension filings and a steady rise in balance-due returns. IRS notices are landing in mailboxes faster than ever, catching many taxpayers off guard. In this environment, guesswork is not an option. Now is the time to double down on process, documentation and transcript review.

Late-season filing trends to watch

Every tax season has its own personality, and 2026 is no exception. Three trends are shaping this year’s landscape:

• More taxpayers are filing returns with a balance due. Inflation adjustments and gaps in withholding are surprising clients who once counted on refunds. For some, this is the second or third year in a row they’ve owed the IRS.

• Information return mismatches are driving a wave of notices. CP2000 under-reporter notices are triggered by missing Forms 1099-K, 1099-NEC and brokerage statements. Cryptocurrency transactions remain a hot spot for errors and omissions.

• IRS phone service is still inconsistent. While online tools have improved, practitioners report long hold times when trying to resolve notices by phone. This reality makes prevention more valuable than ever.

Using IRS transcripts to prevent notices

In late season, account transcripts and wage and income transcripts are essential tools. Before filing, pull the wage and income transcript to confirm all Forms W-2, 1099 and other third-party reports are included. Clients often forget about smaller information returns, but the IRS does not.

For clients who owe money, review the account transcript for estimated tax payments, prior-year credits and penalty assessments. Many taxpayers believe they made a payment that never posted. A quick transcript check can prevent unnecessary notices and client frustration.

When filing extensions, transcripts add another layer of protection. Confirm prior-year adjusted gross income, validate payments already on record and calculate a more accurate estimated extension tax payment. Filing Form 4868, Application for Automatic Extension of Time to File U.S. Individual Income Tax Return, with a realistic payment estimate reduces failure-to-pay penalties and minimizes post-deadline notices.

Staging an efficient extension process

Extensions don’t have to mean chaos. A structured process saves time and reduces client stress. Start by categorizing extension filers early to identify clients with incomplete records, late K-1s or complex brokerage activity. Pull transcripts in advance for these groups.

Use Form 4868 as a standardized checkpoint. Confirm identity verification details, prior-year adjusted gross income (AGI) and current-year payment expectations. Encourage electronic payment at the time of extension filing to create a clear record on the transcript; an extension gives more time to file, not more time to pay.

For business owners and pass-through entity investors, tax professionals should document the expected timing of Schedule K-1 delivery and schedule follow-ups now, because waiting until September invites bottlenecks and unnecessary last-minute stress.

Addressing the rise in balance-due returns

The increase in “file and owe” returns should prompt a deeper conversation. Repeated balances due are rarely random. Review withholding and estimated tax strategies. Adjust Form W-4, Employee’s Withholding Certificate, elections and recalculate quarterly estimates based on current income, not last year’s projections.

For self-employed clients, build a tax set-aside into monthly cash flow, so estimated payments don’t become a surprise.

If a client can’t pay in full, act quickly. Evaluate eligibility for a simple payment plan; over 90% of individual taxpayers qualify for streamlined agreements, which don’t require a collection information statement. Setting up a plan early reduces the risk of enforced collection and additional penalties.

Penalty relief and collection alternatives

Failure-to-file and failure-to-pay penalties add up fast. For first-time offenders, first-time abate relief may be available. Review compliance history before assuming penalties are set in stone.

For clients with larger liabilities, consider installment agreements, currently-not-collectible status or an offer in compromise when appropriate. Each option requires documentation and a realistic financial analysis. Transcripts are the starting point for every solution.

Staying proactive

The final weeks of filing season demand precision. Proactive transcript review, disciplined extension procedures, and early intervention on balance-due cases reduce notices and minimize phone time with the IRS.

Tax professionals who refine these systems now will spend less time reacting and more time advising. For a deeper dive into late-season trends, transcript strategy and practical notice resolution techniques, join NATP’s upcoming webinar, Resolving Common 2026 Issues and Notices On-Demand Webinar, on March 24.

Resolving common 2026 taxpayer issues and IRS notices by NATP Staff

The NATP team is dedicated to supporting tax professionals with expert insights, industry updates and resources that help them serve their clients with confidence.

Information included in this article is accurate as of the publication date. This post does not reflect tax law changes or IRS guidance that may have occurred after the publishing date.