The IRS uses Letter 387C to send you information that you requested. Usually, you use Letter 387C to pursue qualifications for a government program, such as Medicaid. The IRS often will list your tax, the penalties assessed, the interest assessed, the gross or adjusted gross income & the credits against the tax.
Since they are sending you the information at your request, the letter will contain the entries for all the return & assessed items you requested. This information is for you to use in pursuing your benefits. You could also order your "Tax Return Transcripts", your "Account Transcripts & your "Wage & Income Transcripts" to bolster your case. These documents will reveal everything on your record with the IRS & they are a valuable source of information.
If you have any further questions or need help pursuing your Medicaid benefits, please let us know!