How do I elect to include qualified dividends in investment income on line 4g in form 4952? TurboTax online is not giving me the option to elect. Thanks!

You are correct that you have a choice to include qualified dividends in calculating the Investment Interest Expense deduction.  However, TurboTax automatically makes the choice to include qualified dividends or not, depending on which is most beneficial to your return.  

Form 4952 calculates the investment interest expense deduction and transfers the deductible amount to Schedule A, line 9. Form 4952 will not print with the return, unless Schedule A is fileable.

Even when Schedule A is fileable and there is an investment interest expense deduction shown on Form 4952, the IRS does not require that you include Form 4952 with your tax return under certain conditions. See IRS instructions for Form 4952: "Who Must File". In this case, the program will also not print Form 4952. 

Those conditions are when all of the following are true:

- investment income from interest and ordinary dividends minus qualified dividends is more than your investment interest expense
- there is no amount on line 5
- there is no amount on line 2, and
- the amount on line 3 is not more than the amount on line 6

@apoorva-agarwal