Help with injured spouse form?

I need to fill one out, and since our tax form was far from straightforward thanks to the business closure, I have no idea what to put in each spot.

Anyone here can help me without charging me an arm and a leg? Our accountant is too far away and will charge me an arm and both legs.

Sorry LH, this is way out of my line of expertise. I hope someone on here can give you the help you need.