Should I send in my taxes from last year (because I didn’t get a chance to prior to deployment) or is there other steps I have to take?

Yes, you should file your 2019 tax return if you have not already done so. 

The process is the same as with any other tax year except you will not be able to use TurboTax Online or file the return electronically.  TurboTax Online is only used for current year tax returns (2020).  

You can purchase and download a 2019 version of TurboTax to be installed on your computer in order to complete your 2019 return.  If your return results in a tax refund, there may be a late filing penalty assessed, but there would be no interest charged.  If you return results in a balance due, you will be assessed penalties and interest until the taxes are paid.  Therefore, the sooner you get it filed and paid, the better.

Here is a link to see the TurboTax 2019 products available:  TurboTax 2019