If I buy the home and business package of 12 can i use them for past and current filing years for me?

[TurboTaxSusan]

Unfortunately, no. The 2017 versions of TurboTax only have forms and information for 2017.

But you can still purchase older versions of TurboTax, both the CD/Desktop editions and the Online editions:

https://turbotax.intuit.ca/tax-software/prior-year-taxes.jsp