What is SLCSP?
Second Lowest Cost Silver Plan (SLCSP) is the second-lowest priced health insurance plan in the Silver category that was available when you applied for insurance at Healthcare.gov or your state’s Health Insurance Marketplace.
It doesn’t have to be the plan you enrolled in, but it is needed to calculate your Premium Tax Credit.
In most cases, you’ll find your SLCSP premium on your 1095-A in column B. You can use the Health coverage tax tool to get your SLCSP if it’s not on your 1095-A.