During the amendment process, where at can I find the section to change where we lived in 2019? After filing, I realized I messed that part up and need to change it.

Where you lived in 2019 does not go on your tax return.  It can help TurboTax determine what state tax returns you need to file and there are some special circumstances for military. 

Generally speaking, military personnel are subject to tax in their "home of record," which is the state where they resided at the time of their enlistment or commissioning. You may be able to establish a new home of record by taking actions there like:

      Establishing a permanent address.
      Registering to vote.
      Registering your vehicle.
      Getting a driver's license.
Under federal law, states are prohibited from taxing the military income of nonresident service members who are stationed in their states. Note, this protection only applies to military income. If you also have a nonmilitary job, you'll be subject to paying resident state income taxes on those wages.