Will I be able to log into turbo tax on 4/16 to do taxes due date has been extended til April 17th due to holiday for Mass. ?

TurboTax should be available 4/16.

Yes- and you can file an extension as well on 4/16.

Thank you!

Massachusetts the Federal deadline has been extended to April 17 - See this form: https://www.irs.gov/pub/irs-pdf/p509.pdf