I am filing using Form SSA-1099. However, I see I am not eligible for electronic filing because "All of the following lines of Form 1040 have a zero value:" 1040???

If your only income for 2023 was Social Security you do not have to file a tax return.

Who has to file?

http://www.irs.gov/uac/Do-I-Need-to-File-a-Tax-Return%3F

Are you sure you don't have some other income types to enter that you missed?

Pension $$ ??

Bank interest?

_________________________

You may have signed up for LIVE service......that costs you $$ if you actually file.

Here's how to remove it if you haven't used, or don't want to actually use an agent.

How do I remove TurboTax Live? (intuit.com)