W3C validation error

If WordPress adds a <p> before my content and </p> after but it’s not added when posting the page. Were would I find were this in the WordPress software?

This is my error:

Line 315, Column 66: document type does not allow element “form” here; missing one of “object”, “applet”, “map”, “iframe”, “ins”, “del” start-tag .

…mysite.com/wp-login.php” method=”get”><a href=”http://mysite.com/wp-logi

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The mentioned element is not allowed to appear in the context in which you’ve placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might mean that you need a containing element, or possibly that you’ve forgotten to close a previous element.

One possible cause for this message is that you have attempted to put a block-level element (such as “” or “<table>”) inside an inline element (such as ““, “<span>”, or “<font>”).