@mala , you cannot e-file with zero Adjusted Gross Income. However, if you have just interest income, meaning your AGI is positive, there should no reason why cannot e-file. TurboTax may impose requirements like US credit Card ( and I think US mailing address for the card ) but outside of that you should be OK. Are you taxed by the local taxing authority on your interest income? If so you can avoid / ameliorate double taxation by filing for foreign tax credit ( and if you have NO US income i.e. Foreign income is your world income then you would 100% credit).
Is this the issue or am I in the left field ---- please provide your immigration status ( US ), the country where you are, etc.