The you were performing when it appeared (e.g., filing a return, logging in). If you are using a VPN or a specific office network . Any secondary error messages shown in the pop-up.
When all else fails:
For standalone users, renaming the local database file (e.g., hub.sqlite to oldhub.sqlite in %appdata%\Acorah Software Products\TaxCalcHub ) can force the software to rebuild a clean connection. 3. Update Failures Errors often arise during or after a "hotfix" release. Check for Updates: Go to Help > Check for Updates . taxcalc error code 35