As I recall when determining gains from a business for deducting "business use of your home" you add BOTH Schedule "C" and Schedule "D" income/capital gains. TurboTax only considers Schedule "C" income. If you override it by adding Schedule "D" capital gains Turbo Tax rejects your attempt to E-file your return.
I'm at a loss as to why TurboTax disallows E-filing if you have overrides. What do they care? You paid to E-file. If your override is an error isn't it your problem with the IRS?
