The Learning Center | DiMercurio Advisors

Why is my CPA asking for my prior year tax return?

Written by Sean DiMercurio CPA CGMA | Apr 14, 2025

Tax preparation can feel like navigating a maze, especially for small business owners juggling countless responsibilities. When your CPA asks for your prior year's tax return, it might seem like just another piece of paperwork. But here’s the thing: It’s not just a formality—it’s a critical step in ensuring your current year’s return is accurate, consistent, and optimized for your financial situation.

The IRS often requires information from your prior year's return to verify numbers and ensure consistency. For example, if you claimed a home office deduction or reported a net operating loss last year, your CPA needs that data to prepare this year’s return correctly. It’s also a key part of quality control, helping to catch discrepancies or missed opportunities that could cost you money. 

Contents

Why does my new CPA need my prior year tax return?
What if I don't have a copy of my prior year tax return?
How does this benefit me?

 

Why does my new CPA need my prior year tax return?

Your CPA isn’t just being nosy—they’re making sure your tax return is accurate, compliant, and optimized for your financial situation. Here’s why your prior year tax return is so important: 

To Verify Last Year’s Information

The IRS often requires details from your prior year's return to ensure consistency and accuracy.  For example:  

  • If you claimed a home office deduction last year, your CPA needs to verify it’s reported correctly this year. 
  • If you reported self-employment income, your CPA will cross-check it with this year’s numbers to avoid discrepancies. 

Without last year’s return, your CPA might miss critical details that could lead to errors or even an audit. 

To Ensure Accuracy and Consistency

Comparing last year’s return with this year’s helps catch discrepancies or missed opportunities. For instance: 

  • If there’s a mismatch in reported income or expenses, your CPA can investigate and correct it before filing. 

This step is especially important for small business owners, where even minor errors can have significant consequences. 

To Identify Carryovers

Certain items carry over from one year to the next, and your CPA needs last year’s return to account for them. These include: 

  • Net Operating Losses (NOLs): If your business lost money last year, you might be able to offset this year’s taxable income. 
  • Capital Loss Carryovers: If you sold investments at a loss, you can use those losses to reduce this year’s capital gains. 
  • AMT Adjustments: If you paid the Alternative Minimum Tax last year, your CPA must ensure it’s factored into this year’s calculations. 

Missing these carryovers could mean leaving money on the table—or worse, triggering an IRS notice. 

What if I don't have a copy of my prior year tax return?

Don’t have a copy of your prior year tax return? No worries—there are several ways to get the information your CPA needs. Here’s what you can do: 

Obtain a Transcript from the IRS

If you can’t find your prior year's return, you can request a tax transcript from the IRS. A transcript summarizes your tax return and often provides enough detail for your CPA to work with. 

How to request a transcript: 

  • By Phone: Call the IRS at 1-800-908-9946. 
🖥️ We recommend creating an IRS account to ensure access to your tax records.


What’s included in a transcript:
 

  • Income reported to the IRS (e.g., W-2s, 1099s). 
  • Deductions, credits, and adjustments. 
  • Tax payments and refunds. 

Set Up a Power of Attorney (POA)

If you’d rather not handle the transcript request yourself, you can authorize your CPA to access your tax records directly from the IRS. 

How it works: 

  • Complete Form 2848 (Power of Attorney and Declaration of Representative). 
  • Submit the form to the IRS. 
  • Once approved, your CPA can pull your tax transcripts and other records on your behalf. 

This option is especially helpful if you’re short on time or prefer to let your CPA handle the details. 

Alternative Solutions

If a transcript isn’t available or doesn’t provide enough detail, your CPA can work with other records to reconstruct your prior year's information. These might include: 

  • Bank statements: To verify income and expenses. 
  • Receipts and invoices: To document deductions or credits. 

While this approach takes more effort, it can still provide the information your CPA needs to prepare an accurate return. 

How does this benefit me?

Providing your prior year tax return isn’t just about checking a box for compliance—it’s a strategic move to maximize your financial health. Think of it as giving your CPA the full picture of your financial journey. With last year’s return, they can spot trends, identify opportunities, and ensure your current year’s return is as accurate and optimized as possible. 

Here’s how it helps: 

Streamlines the Preparation Process

Your CPA uses your prior year's return as a baseline, which saves time and reduces errors. With last year’s numbers in hand, they can quickly identify what’s changed and focus on optimizing your current year’s returnFor example, if your business structure or income sources haven’t changed significantly, your CPA can streamline the process by referencing last year’s return for consistency. 

Maximizes Deductions and Credits

By reviewing last year’s return, your CPA can identify opportunities you might have missed. For instance: 

  • If you didn’t claim a home office deduction last year, your CPA might find a way to include it this year. 
  • If your income dropped, your CPA might identify new credits or deductions for which you’re eligible. 

This step ensures you’re not leaving money on the table. 

Reduces the Risk of Errors or Audits

Consistent, accurate reporting lowers the chances of IRS scrutiny. By cross-checking last year’s return with this year’s, your CPA can catch discrepancies or inconsistencies before they become problems.  For example, if your income or expenses fluctuate significantly, your CPA can ensure the changes are properly documented and explained. 

The bottom line

Your prior-year tax return isn’t just a formality—it’s a cornerstone of accurate, optimized, and audit-proof tax preparation. By providing it to your CPA, you’re not just meeting IRS requirements but taking a proactive step toward financial success. 

For small business owners, maintaining good records and understanding the process can make all the difference. It ensures continuity, maximizes deductions, and minimizes the risk of errors or audits. And when you work with a trusted CPA, you can rest assured that your taxes are in professional hands. 

At DiMercurio Advisors, we specialize in helping small business owners confidently navigate tax season. Whether you’re unsure about your prior year's return or need help with the entire process, we’re here to help. Let’s turn tax season from a headache into an opportunity to strengthen your financial foundation.