Ok, I see how income and expenses get reported, but what if I have money remaining in my business account at the end of the year.  Does that count as income?  What if its money I initially put in myself as start up funds, will i get taxed on that?

A single member LLC is a disregarded organization by the IRS.  This means that all income and expenses get reported on Schedule C of your individual tax return. When using Turbo Tax, use either Turbo Tax Self Employed (online) or Turbo Tax Home and Business (desktop software).  

You will enter your business information under the Business tab of the program.  There is a section to enter the general information about the business and then there sections for both income and expense.  The program will generate a Schedule C which is included in your individual tax return.

Ok, I see how income and expenses get reported, but what if I have money remaining in my business account at the end of the year.  Does that count as income?  What if its money I initially put in myself as start up funds, will i get taxed on that?

Money left in your business account is not taxable. Your start up funds are considered your investment in the business. Keep track of them. If you sell the business you will need to know your basis. It is not taxable in the current year.