Where do I enter Income from Governmental obligations that are taxable on federal and not taxable on Alabama?

It depends. Verify the deductions to which you are entitled. US Obligations and if you are an AL resident, AL municipal bonds qualify.

• If you have a 1099-INT, entered as a federal obligation - no adjustment necessary. 
• If you have a 1099-DIV, be sure to select a portion of the dividends are interest and enter the amount.

Follow these steps:

1. You can select none of these apply -unless you have federal obligations then select it. 
2. The next screen will allow you to make the state adjustment you need. 
3. Select that you earned exempt interest-dividends in more than one state.
4. Select PA and enter the amount
5. Select the bottom option of multiple states and enter the remainder

Reference: What interest income is exempt from Alabama taxation?