I followed these instructions but I don't think the form is calculating correctly. To my understanding, the deduction should be capped at 2500 per dependent per adult. The issue is the system only ask for one number (not by parent or dependent), then appears to deduct the whole value. It does not appear to cap it at the 2500 limit. Keep in mind that the contributions beyond that could be rolled over. 

I contacted customer service but they barely seem to understand the issue. Anyone know of how to enter it considering my contributions go past the limit and I'd like to carry the additional over?

The Turbo Tax program has been approved for use with the MD return, including the 502SU. All are aware of the group total not being broken up. You will need to keep track of your carryovers.

I don't understand how the program can be correct. I'm entitled to a deduction of $25k (married couple with 5 beneficiaries) but when I input this amount, in the system, my MD tax liability increases by about $1000 vs. when I input a contribution amount of, say, $12,500.  I spoke to a rep (not a tax expert) who was unable to explain this and generally was not helpful.  I thought about upgrading for "expert tax advice" but the cost would be $100 (50 for federal and 50 for state) and I suspect the outcome would be equally unsatisfactory.  At this point, I'm thinking I may have to do my taxes with a professional tax preparer/accountant to ensure I'm getting it right.  

Your program sounds stuck. When I input $25,000 the liability goes down. Let's try troubleshooting.

I suggest you delete the forms and try entering them again. Please do these things:

1. Delete the form 502SU:
   1. Open or continue your return in TurboTax.
   2. In the left menu, select Tax Tools
   3. then select  Tools.
   4. In the pop-up window named Tool Center,
   5. choose Delete a form.
   6. Select Delete next to the form/schedule/worksheet in the list and follow the instructions.
2. Log out of your return.
3. Try one or more of the following:
   • Don't use Internet Explorer.
   • Clear cookies and cache, instructions on the links.
     • Google Chrome
     • Microsoft Internet Explorer
     • Safari
   • Sign in using a different browser.
   • Sign in using a different device.
4. Log back into your return.