Can I do my friends 2017 income taxes on here, step by step? If so how do I go about it?

You can't use the Online version.  You will have to buy the Desktop program from here, https://turbotax.intuit.com/personal-taxes/past-years-products/2017 

 

How to prepare a prior year return

https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-prepare-a-prior-year-tax-return/00/25984

 

Or If you have a simple return You can fill out the blank forms for free.

Here are some blank forms & instructions for 2017

1040 https://www.irs.gov/pub/irs-prior/f1040--2017.pdf     

Instructions https://www.irs.gov/pub/irs-prior/i1040gi--2017.pdf

 

1040A https://www.irs.gov/pub/irs-prior/f1040a--2017.pdf    

Instructions https://www.irs.gov/pub/irs-prior/i1040a--2017.pdf

 

1040EZ https://www.irs.gov/pub/irs-prior/f1040ez--2017.pdf    

Instructions https://www.irs.gov/pub/irs-prior/i1040ez--2017.pdf

 

2017 Tax Tables https://www.irs.gov/pub/irs-prior/i1040tt--2017.pdf

Publication 17 Tax Guide for 2017 https://www.irs.gov/pub/irs-prior/p17--2017.pdf

 

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.

 

under the license agreement you are not supposed to use this software if you will be compensated more than the cost of the software.