Many taxpayers rely on relatives to prepare their returns because it feels practical. A family member may have accounting experience and past success in filing their own taxes. They also definitely charge less than a licensed professional, so it sounds like a safe decision. The truth is that in cross-border or complex filings, that trust can turn into a serious problem. The Canada Revenue Agency holds the taxpayer legally responsible for all information submitted, regardless of who prepared the return. If the CRA later identifies unreported income, false deductions, or missing disclosures, the issue becomes the taxpayer’s liability. Understanding how this happens is the first step to correcting it quickly and limiting damage.