Most financial institutions send a consolidated statement that is a substitute for the standard IRS 1099-series forms. Various sections of the statement should have headings that identify them as 1099-INT, 1099-DIV, 1099-B, etc. The statement contains all the information that would be on a standard 1099, but in a different format. Usually it will label the various items with the box numbers from the standard forms. If you had interest or dividend income, or sold any securities - basically if any section of the consolidated statement is not all zeros - you have to enter it in your tax return. Enter it the same way that you would if it were a standard IRS form.
I don't know. I have never heard of Acorns. What does the form say? Do you have any income from this account? (Interest, dividends, sales of securities?)
This is what acorns says