Will I get my full federal refund if I file an amended return but never filed an original return? NO.
You cannot amend a tax return that was never filed. You will need to file the original tax return.
For tax year 2019 you will need to use the 2019 desktop editions as the 2019 online editions have shut down for new 2019 tax returns - https://turbotax.intuit.com/personal-taxes/cd-download/
For prior year tax returns, 2018 and 2017, you will need to purchase the desktop editions from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/
