I am currently using TurboTax Premier 2018. I'm filing jointly, nothing too unique. However, my wife and I opened an LLC in 2018 with the intent to start a business. We did get the EIN with the IRS (think it was mandatory) and we got a form SS-4. We did NOT actually start the business and did not make any money, and we have not intention to write off any of the expenses from establishing the business entity (like $500 or something). Do we still have to file with the IRS? If so do we do it with our normal Joint return or do we do a separate filing? If we do it with our normal return how? We'd rather just skip it all together if it's not necessary.
"Do I file it with my regular Joint filing or separate?"
See https://www.irs.gov/instructions/i1065#idm140538038032800
Note that if you and your wife are the only members of the LLC in a community property state (and did not elect corporation tax status, and you would be aware of that if you did), then you can treat the LLC as a "qualified entity".
In that event, the LLC is disregarded for federal income tax purposes and you can each report income and expenses of the LLC on Schedules C on your 1040.
"Do I file it with my regular Joint filing or separate?"
See https://www.irs.gov/instructions/i1065#idm140538038032800
Note that if you and your wife are the only members of the LLC in a community property state (and did not elect corporation tax status, and you would be aware of that if you did), then you can treat the LLC as a "qualified entity".
In that event, the LLC is disregarded for federal income tax purposes and you can each report income and expenses of the LLC on Schedules C on your 1040.