Receiving runtime serialization error when trying to check for software updates. Cannot efile until I check for update.

alampki — Mon, 13 Apr 2026 19:30:51 GMT

Re: Receiving runtime serialization error when trying to check for software updates. Cannot efile...

LeticiaF1 — Tue, 14 Apr 2026 13:50:33 GMT

Some troubleshooting ideas to help you with your software update:

Make sure your computer meets the minimum system requirements.
Make sure you have administrator rights on your computer and TurboTax is running as administrator:
- Right-click the TurboTax icon or setup icon and select Properties. In the Compatibility tab, select the Run this program as administrator box and select OK.
In the Control Panel under Internet Options, add https://*.intuit.com to Trusted Sites. Set security level to Medium.
Turn off antivirus software and Windows Defender.
Add TurboTax Desktop to your allowed apps in Windows Defender.
Clean up and defragment your hard drive.
Run Windows Update to keep your computer up-to-date.
Update your computer's hardware drivers.
Update your security software for firewall, virus, and spyware protection.
Make sure you're the only user on your computer running TurboTax. If you're not, switch users and sign out of TurboTax from the other account. If you can't do that, shut down your computer and try again. (Error: 70001)