I will be consulting a professional
That's "the" smartest move you could possibly make. Especially if your state taxes personal income. With two people, you'll have a multi-member LLC. The professional "should" make you aware that the multi-member LLC files it's own 1065 partnership tax return, and that return is due March 15th. Not April 15th like it is for the personal tax return. They should also make you aware of the late filing penalty for a 1065 partnership return. Last I checked, is was $205 per month, per member. So with two members, file one day after the deadline and you're looking at a $410 late filing penalty.
Now there's probably no reason why you can't do this filing yourself. But perfection in that first year is not an option. It's a must. Seeking professional help that first year is probably the smartest thing you can do. Then do it yourself in later years so long as you're comfortable with it.
