If I only have social security disability

[applecore747]

Social Security 1099 shows I don’t have taxable income

[VolvoGirl]

No other income?  If you only get a SSA-1099 it is not taxable and you don't have to report it. And you can't efile with zero income. If you want to file you can also add $1 of interest. Make up a fake 1099 INT and put $1 in box 1. It won't affect your return.

[DoninGA]

If the Social Security benefits are the Only income to be reported on the tax return, then there is no reason or need to file a tax return.

Unless you also received a Form 1095-A for your health insurance through one of the State Marketplace Exchanges or from healthcare.gov then you must file a tax return.