As of April 28, 2017, U.S. citizens or lawful permanent residents (green card holders) who sponsor (petition) a spouse for U.S. lawful permanent residence (a green card) must include Form I-130A, Supplemental Information for Spouse and Beneficiary, with the initial visa petition packet. This new form does not replace the main visa petition form, Form I-130, but is in addition to it.
The idea behind the supplementary form is to gather extra biographical information about the would-be immigrant, thus replacing the previously required Form G-325A. (Formerly, both the sponsor and the foreign spouse were expected to fill out a Form G-325A out and submit it.)
In theory, Form I-130A is to be prepared and signed by the immigrating spouse (called the “beneficiary”). However, getting help with form preparation or having it filled out by a lawyer is fine (that person will just need to fill out a separate portion of the form). And if the immigrant is outside the U.S., he or she doesn’t need to actually sign the form.
The form is available for free download on the I-130 page of the U.S. Citizenship and Immigration Services (USCIS) website.
Note: However, that the USCIS instructions to Form I-485, which is used by applicants able to adjust status while living in the U.S., have not changed with respect to Form G-325A. A non-citizen in the United States who plans to adjust status (rather than applying for the green card through an overseas U.S. consulate), must, therefore (until further notice) fill out and submit Form G-325A as part of the packet of adjustment forms and documents. (If you haven't already filed the Form I-130, you may be allowed to mail it and the I-485 and all the other adjustment of status forms and documents to USCIS at one time.)