HL1
Returning Member

How is "Other Income Taxes" under "Deduction and Credits" used?

When I click on the number in blue with the underline in "Other Income Taxes" under "Deduction and Credit", it shows "Federal withholding" + "State withholding" + "State Mandatory Taxes".   

1.  What is "State Mandatory Tax"? Where does this number come from?  

2. How is "Other Income Taxes" used? which form would I see this number?  thanks,