When I ran an example, I got a couple of possible reasons:
1.If you entered MD for withholding, the program requires a state number in Box 13
2. The Learn More link shows this information:
Maryland Special Handling of Pension Distributions
TurboTax Maryland uses the following pension codes:
P - Maryland state pickup contributions, limited to the taxable distribution for this year. Any excess can be carried forward to future years.
M - Active-duty military retirement
S - Self-employed pension plan (Keogh) you contributed to prior to 1967
You can subtract from your Maryland taxable income a portion of your qualified pension and retirement distributions if you are over age 65 or you (or your spouse) are totally disabled.
Distributions from an IRA, simplified employee pension (SEP), Keogh or ineligible deferred compensation plans don't qualify for this subtraction.
When you designate your distribution as one of the above types, TurboTax does all the math for you on your Maryland return.
