All around assistance

Hello,

 

I'm completely oblivious to anything relating to taxes. My husband used to do our taxes, but he passed away and I've been struggling with them ever since. I did them, but I know I probably did them incorrectly. Is it possible to have an Intuit professional check them over and/or just do them. Also, I started doing a little marketing on the side where I promote events and/or do events myself. I was told that I could claim the expenses and income (the income is very little because I just started), I've collected all the receipts etc. What information do you need for me to add this to my taxes?