No - You do not have to file a tax return for 2018, but not because you are 64. There are no age exceptions for filing
an income tax return.
If your gross income
is
below $12,000 (since you are under age 65) you need to file a tax
return.
Your
veterans benefits are not taxable; your Social Security isn't taxable as long as the income you mentioned is your only income.
Please see these FAQs
for more information: