How do I file Pennsylvania state tax if I'm active duty military and exempt

See the answer below for how to file PA state tax when active duty and exempt.  I have also included two screenshots below that show the screens referred to in the answer.

Active duty military income earned outside of Pennsylvania by a Pennsylvania resident is not subject to Pennsylvania income tax. In the state section of TurboTax, when you come to the page titled “Compensation Summary”, click edit beside your military income.   Check the box to indicate that this income is not taxable to Pennsylvania.  This will flag your military income as not taxable in Pennsylvania. 

However, any interest, dividends, capital gains, rental income, etc  IS taxable by PA regardless of where you are stationed.

If you have already e-filed, you can submit copies of your military orders and an explanation of where you earned your active duty pay to:

PA Department of Revenue
Electronic Filing Section
P.O. Box 280507
Harrisburg, PA 17128-0507

Or FAX to:
717-772-4193

Please make sure your Social Security number is on your orders.

Thank you for this - very helpful.

Key thing missing in those instructions. Make sure you mark yourself as a non-resident. It's not clear in PA status websites and even less clear on the Turbotax prompts. Otherwise, it will try and force you to check the taxable box on the income.