Retirement tax questions

You are correct MD only changed your deductions they did not change the income taxed.  You will need to do that as suggested by the MD revenue agent you contacted.  You will need to amend your 2022 MD return; the amended return will need to be printed/mailed in at this point (see steps below).  In the "General/Residency" section you should indicate you were a part-year resident in MD and answer the residency questions as applicable.  Then you will need to edit the "Income/Adjustments" section.  There you need to allocate your income sources so that only the income you received while in MD is allocated to MD.  So assuming your pay sources were monthly and you left in August you would allocate 8/12 months (.667 X income) to MD.  

Here is a link with more information on amending a state return, if needed for a desktop product. 

1. Sign in to TurboTax.
2. On the home screen, scroll down to Your tax returns & documents and select the year you want to amend.
3. Select Amend (change) return, then Amend using TurboTax Online.
4. On the screen select The IRS or state sent me a notice (this will allow you to amend only your state return without making changes to your federal) and Continue.
5. On the next screen, select Something Else and Continue.
6. On the screen select 2022 state.
7. Continue until the Let's Amend your State Taxes screen. Select Amend next to your state return, and continue through the screens to make your amendments.