Yes, you can use your 2016 numbers instead of the 2017 numbers if it produces a better result for your EITC or Child Tax Credit. To do this, once you enter your personal information in TurboTax it will look at your state of residence and ask you if you were affected by the hurricane. If you select yes, it will ask you again when you get to the sections where your previous years AGI can be used instead of your current year AGI.
https://www.irs.gov/newsroom/help-for-victims-of-hurricanes-irma-and-maria
https://www.irs.gov/newsroom/tax-relief-for-victims-of-hurricane-harvey-in-texas
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