Maryland State from 502, the figure put into line 17 is not correct, it should be the Standard Deduction but its some other number. What is wrong?

[ThomasM125]

Are you sure you are calculating the standard deduction correctly? It should be 15% of your Maryland adjusted gross income as listed on line 16 of your Form 502. However, it is a minimum of $1,700 and $3,450 and maximum of $2,550 and $5,150, depending on whether you are filing single or married-joint.  Per the instructions for MD Form 502:

MD Form 502 Instructions

You can use the standard deduction worksheet on page 12 of the instructions to get an accurate calculation of your standard deduction: