Get your taxes done using TurboTax

It doesn't matter.

Even if you are creating a carry forward loss, that would need to be manually entered between products. 

Your 2016 amended return be completed in TurboTax CD/Download; it will need to be printed and mailed.  

Your 2018 tax return can be completed in either TurboTax Online or TurboTax CD/Download.

For more information on filing amended tax returns, follow these links:

What to Include with Amended Tax Returns  

How to Amend 

Tips to Amend 

IRS on 1040X

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