I know in the past my (brokers, banks, retirement) financial memberships including banks all have had links and discounts this time of year.. so if you go to your own bank and put in 'turbo tax' in the search box, there is a good chance your bank has its own link. You want to check www.taxfreedom.com as well.
I found one thru www.fidelity.com You don't need an account with them, you can set one up for free though. Turbo Tax is 50% off. Click under retirement and guidance, then tax center. HTH!