How do I fix NETFILE error code 16?
by TurboTax • 
Updated January 21, 2026 9:44 AM
If you get NETFILE error code 16, it means the CRA’s records indicate they've already received your 2025 tax return. The error message should display your confirmation number.
If you haven't previously filed, contact the CRA at:
1-800-959-8281
Yukon, Northwest Territories and Nunavut: 1-866-426-1527
Outside Canada/U.S. call collect: 1-613-940-8495
