New law enacted by Congress geezers.  SSA has to answer IRS questions and IRS has to answer SSA questions.  They're hoping it cuts down on the error rate.

The SSA amount is income that has to be reported and may be taxable, 1% to 85%, or tax-free.  The Medicare Part B and D premiums are deductible as medical expenses, subject to the 7.5% floor.  Or, as self-employed health insurance.  You can spend half a day getting to someone who knows the law, or you can make a reasonable estimate of the amounts based on other correspondence your client probably has received from SSA.