"Mark as Estimated" checkbox is not retaining the checkmark (Windows)
Updated: 5/27/2011
Article ID: SLN51476
Unlike earlier versions, the Mark as Estimated checkbox in the TurboTax 2010 desktop software for Windows interview doesn't retain the checkmark when you later revisit it.
The checkmark isn't "sticking" or "holding."
Workaround
To work around this issue, switch to Forms mode and mark the amount as estimated on the form itself.