Is that amount of long term care premiums for one year only? Or is a total of all premiums paid over the past years deductable on my Maryland return?

[JulieCo · Accepted solution]

It would be the premiums that were paid in 2018.  See more information from the Maryland Comptroller below:

For the current tax year, you can claim a credit equal to the premiums paid, up to a maximum of $410 for each insured person 40 years of age or younger, and up to a maximum of $500 for each insured person 41 or older. 

From:  https://taxes.marylandtaxes.gov/Individual_Taxes/General_Information/Tax_Credits_and_Deductions/Long...