7 features to consider when choosing tax software

Key takeaways

• The best professional tax software for mid-size, large, and growing CPA firms must support structured, multi-preparer workflows.
• Deep diagnostics and performance stability are essential for complex, high-volume returns.
• Cloud-native architecture improves collaboration and reduces operational risk.
• Integrated automation and advisory tools enable scalable growth without added friction.

For mid-size, large, and growing tax and accounting firms, the best professional tax software supports multi-preparer workflows, complex filings, and a large number of returns without compromising workflow, performance, and scalability.

Collaboration and integration are important. For example, Intuit® ProConnect™ Tax integrates with Intuit Accountant Suite (replacing QuickBooks® Online Accountant as of December 2026), and enables firms to move even more toward providing advisory to their clients.

Here are 7 features firms should consider when choosing the best tax software for their practices.

1. Structured multi-preparer workflows

In mid-size, large, and growing CPA firms, returns move through 5 defined stages: preparation, review, revision, approval, and filing. Software must support that by offering clear oversight and making it intuitive for new firm hires.

“We don’t have time for steep learning curves; our focus is on building a repeatable, scalable process,” said Nick Boscia, CPA, EA, co-owner of Boscia & Boscia, PC and owner of The Balanced CPA “Software that offers logical workflows, built-in training resources, and responsive support helps new team members become productive within days, not weeks.”

The strongest platforms allow multiple team members to work within the same system, enable status tracking and provide workload visibility, along with embedded reviewer notes and checkpoints. Without these safeguards, tax season becomes reactive rather than controlled.

Enterprise-ready workflow architecture is what distinguishes software built for growing firms. Ask these questions:

• Can preparers and reviewers collaborate without version conflicts?
• Is return progress visible firm-wide?
• Are review controls native to the system?

2. Advanced diagnostics and compliance

As complexity increases, so does risk. Business entities, consolidated filings, and multi-state returns require more than basic error checks.

The highest-rated professional tax software consistently provides:

• Extensive built-in diagnostics.
• Intelligent calculation validation.
• Proactive compliance updates.
• Clear identification of inconsistencies before filing.

Firms work smarter rather than harder; rework across hundreds of returns creates meaningful time savings, tax compliance, and protects the firm’s reputation.

3. Performance under volume

A large number of returns is a test for any tax software; any platform that performs well at low return counts may slow down as the numbers increase.

Mid-size and large CPA firms should evaluate whether their tax software can:

• Sustain performance during heavy filing periods.
• Manage high-volume e-file submissions efficiently.
• Handle individual and complex business returns within one environment.
• Scale without constant IT intervention.

Rely on your staff to let you know if the system is buckling under pressure. If your firm’s growth exposes system limitations every busy season, the tax software may need to evolve.

4. A cloud-native infrastructure

Infrastructure reliability increasingly depends on tax software that is in the cloud. cloud.

“Our team works across multiple locations, so I need cloud-based software that’s encrypted, backed up regularly and automatically, and allows multiple users to access real-time data without bottlenecks or issues,” said H. Randy Hughes, CPA, founder of Counting Pennies LLC.

With nearly 25% of firms still using paper-based processes, a jump to the cloud can seem daunting. However, large firms will benefit from the cloud because it removes the slowdowns caused by paper- and desktop-based processes.

True cloud-based professional tax software enables real-time access across locations, automatic updates without manual installations, reduced server maintenance, and simplified user and permission management. For larger teams, the cloud reduces downtime risk and eliminates version inconsistencies that can disrupt multiple preparers.

Cloud-native systems also make it easier to connect books-to-tax workflows and advisory tools within the same environment, reducing a firm’s reliance on external exports or disconnected systems.

5. Integration is a strategic advantage

Tax and accounting firms rely on an ecosystem of tools to get their work done, including accounting systems, document management, portals, payroll, and advisory software.

The best professional tax software integrates directly with accounting software such as Intuit Accountant Suite, and connects compliance data to planning tools within the same workflow.

When integration is native, trial balance imports accelerate, duplicate entry declines, reconciliation errors decrease, and advisory insights surface more naturally. For mid-size and large firms, integration is structural efficiency, not a convenience.

ProTip: Platforms such as ProConnect Tax combine native cloud architecture with built-in Intuit Accountant Suite integration and embedded advisory tools such as Intuit Tax Advisor. This type of connected ecosystem allows firms to move from books to tax to advisory within a single environment, reducing rework and supporting scalable collaboration across teams.

6. Advisory is embedded into the tax workflow

Many growing firms are expanding into tax planning and strategic advisory, offering even more value to their clients. As a result, your tax software should support the ways a firm can build strong relationships with your clients.

“My vision is to transition my clients to a forward-thinking model, and have multiple client touch points throughout the year with a focus on tax planning and strategizing,” said Trevor Betts, EA, president of Virtual Tax Solutions.

Look for platforms that surface planning opportunities during preparation, generate client-ready summaries, support estimated payment projections, and connect compliance data directly to advisory tools.

Advisory is growing, and tax software should support it. Survey respondents of CAS Benchmark Survey of 2024 reported a projected revenue percentage growth rate of 99% over the next three years. By embedding advisory within a tax platform, firms can expand revenue and solidify the firm/client relationship by providing ongoing services. 

7. Reducing migration risk is key

Switching professional tax software in a larger firm requires careful execution, so firms need to make sure that the support provided by the provider includes migration assistance and support.

Larger, growing firms need to evaluate their data conversion accuracy, onboarding support, and training for preparers and reviewers. A structured migration approach protects productivity and minimizes disruption during the transition, especially important for firms with centralized review processes.

It’s all about control

For mid-size, large, and growing CPA firms, the best tax software:

• Supports multi-preparer collaboration.
• Delivers diagnostics depth for complex returns.
• Maintains performance under volume.
• Integrates across your accounting ecosystem.
• Enables advisory expansion within the same platform.
• Reduces infrastructure burden through modern architecture.

As your firm grows, your systems must reinforce control, visibility, and scalability. Tax software processes returns, but also supports operations, the business, and growth.