You can say active duty, it will ask questions about your service, time and combat area status.
https://ttlc.intuit.com/questions/3791512-i-am-a-national-guard-soldier-on-active-duty-due-to-a-depl...
Disclaimer: Not a tax professional. Information gathered from internet links. Anything dated in June 2019 was posted in prior years and is before the 2019 limits and changes.
