By mail, a copy of it will be added to your online account under documents section.

@Haruna Mohammed under the documents tab on uscis?

@beverlyn ebuen mine was email only

@beverlyn ebuen, USCIS will sometimes upload some of your evidence under the I-130 documents section and upload your access code under I-485 if you have one, however, the welcome notice will come to your email or text message.

@beverlyn ebuen have you received welcome lette?

@nur Tim yes via email