Sorry you need a full Windows or Mac computer to install the Desktop program. Maybe you can use a relatives or friends computer to install it. Otherwise ask for a refund.
Window System Requirements
Mac System Requirements
How to contact Turbo Tax
What is the Turbo Tax phone number
If you have a simple return and want to file for free you can fill out the forms by hand. Here are some basic forms.....
Here is the 2020 1040 return
or if you want bigger type use 1040SR for Seniors,
2020 1040 Instructions
2020 EIC and Tax Tables
Don’t forget your state. And you will have to print and mail your returns. So be sure to attach copies of your W2s and any 1099s that have withholding on them. You have to mail federal and state in separate envelopes because they go to different places. Get a tracking number from the post office when you mail them for proof of filing.
Then when you file for 2021 you need to enter 0 for the 2020 AGI since you are filing late.