What to do with HTML Tidy?

[C.T.]

I am building a website, Upon validation the program produced 30 errors and 1 warning. I have read as many articles as I can stand about editing the source code. I have tried this but can't seem to either find the line that is the problems, or "fix" it. I see the Cleaned Up version the the bottom of all the errors, is it possible for me to just copy and paste this or is there a program that will clean up the code? I have a mac and am tired of trying to get this to work. I read it would be better to correct the issues manually, but it seems to me if the software found the error why not just correct them and be done with it. Plus, if a site has 100 error it does not seem reasonable to me for a person to manually fix these errors if there is software that can do it for you. I need my site validated ASAP. I need some ones help because I am completely frustrated. Thank You!