Please expand and clarify the question(s) you are asking. The SSA-L1033 is for the termination of disability benefits. The SSA-1099 is for social security benefits.
Have you already filed and your return accepted? If so you must wait until at least February 23, to amend your return to add the forms. If you are due a refund from your original filing please wait until the refund is received. If you have not already filed, log in and click on Wages & Income, then scroll down to Social Security and add your data there.
@rurualroute3