@agtzc1961-gmail- , agreeing with my colleague @Bsch4477 on the process to report foreign social security payments to an US person ( citizen/ GreenCard ), please not that in this particular case the US-Mexico Tax treaty , under article 19 of the treaty declares as to which contracting state ONLY has the right to tax this income -- see below :
" ARTICLE 19
Pensions, Annuities, Alimony, and Child Support
1. Subject to the provisions of Article 20 (Government Service):
a) pensions and other similar remuneration derived and beneficially owned by a resident
of a Contracting State in consideration of past employment by that individual or another
individual resident of the same Contracting State shall be taxable only in that State; and
b) social security benefits and other public pensions paid by a Contracting State to a
resident of the other Contracting State or a citizen of the United States shall be taxable only in
the first-mentioned State. "
Thus you DO NOT report the report the SSA payments from Mexico to US -- Mexico has the right to tax these incomes under its laws.
Does this make sense ? Is there more I can do for you ?
pk
