No, you do not need to file taxes if your spouse's VA military disability is your only source of income.
Thank you for your additional information about having dependents. You can file a tax return.
To qualify for the Child Tax Credit, you have to include the name and Social Security Number for each dependent you're claiming the tax credit for. You and any joint filers must also include your taxpayer identification numbers on your tax return.
Additionally, the child must:
If you file using TurboTax, you will be asked simple questions to determine if you meet the requirements to qualify for this tax credit when completing your tax return.
Other disability benefits don’t count as earned income when you claim the EITC. These include:
For more information, see Publication 596, Earned Income Credit.