The NY form is stating Sch A Part 2 code is not a valid addition code. Does it want a 0 or blank if there are no additions/subtractions?

You need to complete Form IT-225 and submit it with your return to report any New York additions and subtractions to federal adjusted gross income that do not have their own line on your return. 

check Instructions for Form IT-225 to see if you have any additions or subtractions that need to be entered on this form. 

If there is no additions or subtractions, delete the form. 

On the menu bar on the left,

1. Select Tax Tools 
2. On the drop-down select Tools 
3. On the Pop-Up menu select Delete a Form 
4. This will give you all of the forms in your return 
5. Scroll down to the form you want to delete 
6. Select the Form 
7. Click on Delete. 

Always use extreme caution when deleting information from your tax return.  There could be unintended consequences.