If I’ve already filed my taxes but did not get a credit due to Hurricane Micheal How do I go about doing this

Here's where you go to report a hurricane loss:

1.  Click Federal on the left-hand side menu.

2.  Click Deductions & Credits across the top.

3.  Scroll down to Other Deductions and Credits and click Show more.

4.  Click Start or Revisit by Casualties and Thefts. 

If your return is already filed you need to amend your return. Here are the instructions how to amend your return using turbotax 

https://turbotax.intuit.com/tax-tips/amend-return/how-to-file-an-amended-return-with-the-irs/L6kO691J8