Investors & landlords

@Carl My husband just recently got a DBA with a separate EIN. Applied for the DBA in November 2022, got EIN December 21, 2022. We've only had expenses for starting the DBA, business cards, flyers, etc. Do we need to file the business with our personal tax return or do we file separately them? First year having to add something like this and want to make sure I'm doing it right? We do not have any sales.