Troubleshooting

If you are using TurboTax Online, go to the Tax Home page, click on Review, and then click on Continue/Start. Continue forward until you get to the page where you certify your info. That page will have a spot to enter/change your NETFILE Access code. Click "Yes I certify" to save your changes.

If your access code still doesn't work, you can try filing without it - it's optional.