I need to do 2017 2018 and 2019, what is my total cost w intuit including Zion’s

What is Zion's?  You can do 2019 either online HERE  or buy the Desktop CD/Download program HERE.

You need a full Windows or Mac computer to install the Desktop program.

Then for prior years you can only buy the Desktop installed program

https://turbotax.intuit.com/personal-taxes/past-years-products/ 

You have to buy each year separately.  Prior years can only be mailed.  

When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS received the return. Don’t forget state.

Important! Mail Federal and State in separate envelopes and mail each year in separate envelopes.