Taxes: Does this seem right?

[esknights]

I just filled out an E-tax online to see what my refund or lack there of would be. Before including poker, I was going to receive a refund of about $600.

I then went back and put in gambling winnings under other income. I put in $7000 and the program said I owed the IRS about $500. So I guess that is a turnaround of $1100 which is 15% of my winnings.

This was just a rough draft. I only included my net poker income which I am sure is not right. I looked into filing a Schedule C, but was unsure of how this would work. What are the advantages of filing a Schedule C or C-EZ.

Also, shouldn't the IRS be happy that I am even attempting to claim my gambling winnings as I believe that most people do not?