Sorry--no, there is no senior discount. The fees for using TurboTax are not based on your age. The fees are based on the complexity of your return and on the forms and schedules needed to complete your tax return. If you have a VERY simple return that only uses a Form 1040 and no other forms or schedules you can use the Free Edition. Otherwise you upgrade into paid versions.
https://turbotax.intuit.com/personal-taxes/online/
https://turbotax.intuit.com/personal-taxes/online/free-edition.jsp
Or—-Use this IRS site for other ways to file for free. There are 8 free software versions available from the IRS Free File site
https://apps.irs.gov/app/freeFile/
Help for taxpayers Volunteer Income Tax Assistance VITA
Income below $58,000
https://www.benefits.gov/benefit/1543/
https://www.irs.gov/individuals/free-tax-return-preparation-for-qualifying-taxpayers