Filing your taxes might seem straightforward—until a small oversight triggers a CRA review, penalties, or missed refunds. Whether you’re managing personal finances or running a business in Toronto, tax mistakes can cost you time and money. Here are some of the most common errors we see as accounting experts in Ontario—and how to steer clear of them.
1. Misreporting Income Across Multiple Streams
Whether you’re a freelancer juggling contracts or running a Shopify store, income from all sources must be declared. A common issue in accounting for ecommerce businesses is underreporting sales from third-party platforms or forgetting foreign income. Every dollar counts—especially when the CRA is watching.
2. Missing Deductible Expenses
Failing to claim eligible expenses is like leaving money on the table. This is especially true for small business owners or those needing ecommerce bookkeeping support. Office supplies, digital tools, mileage, and even part of your home office may qualify—but only if properly tracked and recorded. That’s where our bookkeeping experts come in.
3. Filing Incomplete Returns
Even one missing slip can cause a red flag. Incomplete returns lead to reassessments or delays. If you’re rushing through your taxes at the last minute, especially without virtual personal tax returns, errors are far more likely. Take your time—or better yet, work with a professional who won’t miss a thing.
4. Using the Wrong Tax Forms
We’ve seen it too often—individuals filing under the wrong category, or businesses using outdated forms. This is common among newer entrepreneurs who are unfamiliar with accounting for e-commerce requirements. Staying up to date with form changes and requirements is critical to remaining compliant.
5. Poor Recordkeeping
Lost receipts, unlogged transactions, and guesswork are not valid financial records. Whether you’re a service provider or navigating accounting for e-commerce, messy books create chaos at tax time. Organized records make audits less stressful—and make sure you don’t miss deductible claims.
6. Not Planning Ahead for Tax Payments
If you’re self-employed or own a business, waiting until the last minute to prepare for your tax bill can wreck your cash flow. With proper Canadian tax and accounting services, you’ll know what to set aside and when. This keeps your business running smoothly and free from unnecessary interest charges or late fees.
7. Ignoring Changes in Tax Rules
Tax legislation isn’t static. What applied last year may no longer qualify. Whether it’s a new tax credit or a policy update, staying compliant means staying informed—especially if you’re managing personal tax services yourself. That’s why working with professionals who live and breathe tax law is a smart move.
Let Us Help You Avoid These Tax Mistakes

From missed deductions to messy records, we help you get it right the first time. Contact us to get started
At Accounting Plus Financial Services Inc., we don’t just crunch numbers—we help individuals and businesses across Toronto stay compliant, save money, and plan smarter. Whether you need personal tax accountants, support with accounting for e-commerce, or full-service Canadian tax and accounting services, we’ve got you covered.
Contact us today, and let us take the guesswork out of your taxes with our Shopify tax services and Amazon tax services.



