Tax Team Preparation 2026: EY’s 3 Strategies for Year-End

Your Q4 calendar is already filling up, and somewhere between closing October books, managing extensions, and fielding client calls about estimated payments, you’re supposed to be preparing your team for a 2026 filing season that’s shaping up to be more complex than last year. That tension — between executing today and building for tomorrow — is exactly what EY’s three-strategy framework for year-end tax team preparation is designed to resolve.

This post pulls the actionable core from EY’s published guidance and maps it to what a 10- to 50-person CPA firm or accounting practice actually needs to do before December 31.

Why Waiting Until January Costs You the Season

EY’s position is direct: tax teams need to figure out how to juggle year-end tax accounting and compliance while simultaneously preparing for the next calendar year. Those two things aren’t sequential — they overlap. If your team treats year-end close as the finish line, you’ll spend January rebuilding momentum instead of executing.

The stakes are real. EY’s Tax and Finance Operations (TFO) survey — which captured input from 1,100 tax leaders and 500 finance leaders across 32 jurisdictions and 18 industries — found that 86% of tax and finance leaders ranked data, AI, and technology as a top priority. That’s not a future concern; firms that haven’t made infrastructure decisions by Q4 2025 will be making them under deadline pressure in February.

Strategy 1: Make Generative AI a Working Tool, Not a Talking Point

EY’s first concrete recommendation for 2026 planning is to incorporate Generative AI into tax processes — and the guidance gets specific about where it pays off fastest.

AI can standardize data inputs and outputs across the full record-to-report lifecycle, which reduces review time and improves efficiency in workflow, calculations, and report generation. For a firm running Drake, Lacerte, or ProSeries across dozens of client files simultaneously, that kind of standardization matters: one inconsistent import format or a mismatched chart-of-accounts mapping can cascade into hours of manual cleanup during crunch week.

The second AI use case EY highlights is real-time updates on evolving tax laws. Rather than relying on a partner to catch a mid-season IRS notice, AI-assisted monitoring surfaces relevant changes as they happen and flags which client files are affected. That’s the difference between proactive compliance and reactive scrambling.

Practical step for Q4: Identify one repetitive workflow — data extraction from QuickBooks into your tax software, or first-pass review of depreciation schedules — and pilot an AI-assisted tool on it before January. Don’t try to transform everything at once. One clean win builds team confidence and produces a documented ROI you can reference when budgeting for broader rollout.

For an overview of how EY frames this recommendation in the context of broader tax team strategy, the original article is worth reading directly IRS.

Strategy 2: Build a Controversy-Ready Compliance Structure

EY’s 2026 Global Tax Policy and Controversy Outlook identifies rising tax controversy as one of three major drivers shaping the tax environment next year. The practical implication: audit and inquiry volume is climbing, and the firms caught flat-footed are those whose documentation and data management practices were built for filing, not for defense.

EY’s specific finding is that effective data management is critical to addressing rising tax controversy — and that both businesses and tax authorities are increasingly using technology, including GenAI, to pursue it. That last point matters. If an IRS examiner arrives with AI-assisted analytics, your client’s disorganized QuickBooks file is a liability, not just an inconvenience.

For a CPA firm, controversy-readiness at year-end means three concrete things:

1. Audit trail integrity. Every adjustment, reclassification, or override in your tax software should have a documented rationale attached. Build that habit into your workflow now, before you’re reconstructing it under examination.
2. Source document retention. Client files should include the underlying support — bank statements, depreciation schedules, payroll records — not just the return. If you’re hosting those files in a managed cloud environment, check that your backup and retention policies cover the full IRS statute of limitations window (generally three years, six for substantial understatement, unlimited for fraud).
3. Scenario planning for federal and state policy shifts. EY’s audit committee guidance specifically recommends monitoring tax policy at the federal, global, and state levels and using scenario planning for unexpected changes. For most CPA firms, this means having a one-page memo per client segment (S-corps, pass-throughs, high-net-worth individuals) that outlines how a material change in rates or deduction rules would affect their 2026 position.

EY also notes that businesses can help shape implementation by providing input as the U.S. Treasury Department develops guidance on emerging rules. If you have clients affected by international provisions or significant proposed regulations, this is the year to engage their advisors proactively rather than waiting for final regs.

Strategy 3: Lock Down Infrastructure Before Peak Season

The third strategic pillar is the one firms most consistently defer — and most consistently regret. Technology infrastructure decisions made in November are implemented thoughtfully. The same decisions made in February are implemented hastily, often mid-return.

EY’s survey data reinforces this: with 86% of tax and finance leaders citing data, AI, and technology as a top priority, the infrastructure layer that supports those tools — cloud hosting, multi-user access, backup and recovery — is no longer back-office plumbing. It’s a competitive capability.

For a firm running multiple desktop tax applications — Drake, Lacerte, UltraTax, ProSeries, or ATX alongside QuickBooks Desktop or Sage 50 — the single biggest infrastructure question is whether those applications are hosted in a managed cloud environment that the full team can access remotely and securely. During peak season, a local server that goes down at 9 PM on March 14 is an emergency. The same applications running on a managed hosted platform with automatic backups and remote desktop access are just… working.

The year-end window is the right time to migrate or consolidate, because you can test the environment against real workloads before the clock starts ticking on client deadlines.

How Sagenext Helps

Sagenext provides fully managed cloud hosting for the tax and accounting software your firm already uses — QuickBooks Desktop, Enterprise, and Premier; Sage 50 and Sage 100; Drake, Lacerte, ProSeries, UltraTax, and ATX, among others.

The managed part is the point: provisioning, security, software updates, and data backups are handled for you. Your team connects via remote desktop from any device, which means a staff accountant finishing a return from home at 10 PM on April 14 has the same access as someone sitting in the office. For multi-user firms, that flexibility eliminates the version-conflict and file-locking problems that eat hours during busy season.

If you’re evaluating whether to migrate before 2026 season, Sagenext offers a free trial with no credit card required — enough runway to validate performance before committing.

Common Q4 Mistakes That Hurt the Following Season

Before the FAQ, one pattern worth naming: the firms that struggle most in February and March are usually the ones that made three specific Q4 errors.

• They delayed technology decisions until they felt the pain of the problem, rather than solving for it in advance.
• They skipped scenario planning and got caught by a state-level rule change that affected a significant chunk of their client base.
• They under-invested in staff training on new tools, so adoption was low and the tools delivered a fraction of their value.

All three are avoidable with a structured Q4 preparation checklist. For a practical workflow template your firm can adapt, see our guide to [building a tax season readiness checklist]Lacerte Cloud For Tax Season.

Frequently Asked Questions

What does EY actually recommend for tax teams preparing for 2026?

EY’s published guidance recommends three things: incorporating Generative AI into tax workflows to standardize data and reduce review time; building data management structures that can withstand rising tax controversy; and monitoring federal, state, and global tax policy with scenario planning to handle unexpected rule changes. The recommendations come out of a TFO survey of 1,100 tax leaders and 500 finance leaders across 32 jurisdictions.

How can a small CPA firm realistically implement GenAI before filing season?

Start narrow. Pick one repeatable, high-volume task — first-pass income classification, depreciation schedule review, or organizer data ingestion — and pilot an AI-assisted tool on that task for Q4 clients. Don’t automate judgment-intensive work first. The goal is to document one measurable efficiency gain before January, then expand from there based on what actually worked.

What does EY mean by “rising tax controversy” and why does it affect my firm?

EY’s 2026 Controversy Outlook flags increased audit and inquiry activity across jurisdictions as tax authorities invest in analytics and AI. For a CPA firm, this means clients face a higher probability of examination, which means your documentation standards need to be defense-ready, not just filing-ready. Clean audit trails, retained source documents, and well-reasoned positions matter more than they did five years ago.

When should a firm migrate to cloud-hosted tax software?

Q4, before filing season begins, is the right window. You have time to test the environment against real workloads, train staff on remote access procedures, and resolve any configuration issues without deadline pressure. Migrating in January or February — when you’re already running returns — creates risk and distraction you don’t need.

What tax software can be hosted in a managed cloud environment?

Most major desktop tax and accounting applications can be hosted, including Drake, Lacerte, ProSeries, UltraTax, ATX, QuickBooks Desktop (Pro, Premier, Enterprise), Sage 50, and Sage 100. A managed hosting provider handles the server environment, while your team works in the same application interface they already know via remote desktop.

Key Takeaways

• EY’s year-end framework asks tax teams to run compliance and next-year preparation simultaneously — not sequentially.
• 86% of tax and finance leaders in EY’s TFO survey ranked data, AI, and technology as a top priority, making infrastructure decisions a competitive issue, not just an operational one.
• GenAI’s most immediate value in tax workflows is standardizing data inputs and outputs across the record-to-report cycle, reducing review time on calculations and report generation.
• Rising tax controversy in 2026 makes documentation quality and data management a first-line defense, not an afterthought.
• Scenario planning for federal, state, and global policy shifts — recommended explicitly in EY’s audit committee guidance — should be built into Q4 client review, not postponed until rules finalize.
• Infrastructure migrations (cloud hosting, workflow tooling) made in Q4 can be tested and optimized before peak season; the same decisions made in February get rushed.