w3 Validation Errors

Hello Everyone,

I have seen several topics about w3 validation but none are general enough to help. All seem to be about their code. What I need to know is how to find the lines to edit and fix the issues in wordpress. I could post my code in backticks but then it wouldnt help people that need general guidance… and I have thousands, literally thousands of errors spanning hundreds of pages.

What file would i find line Line 67, Column 10: ?

‘<noscript <img height=”1″ width=”1″ alt=”” style=”display:none” src=”https://ww…&#8217;

or Line 142, Column 132: ?

“…state+%7C+The+Domain+Realty+Group&link http%3A%2F%2Fwww.thedomainrealtygroup.c…”

Do I look in the php files for the main theme or the child theme? And if not there, where do I find the files w3 is talking about? Can I get to them through the wp backend/edit tab or do I have to FTP into the host and download them?

Should I copy the code from the wp edit panel into a text editor like NotePad+ and then try to edit the errors?

How to I find columns when it isnt annotated in the php files?

I am completely lost please help.