I have embedded form in my website using HTML code but the UTM parameters are not getting tracked.

I have embedded form in my website using HTML code but the UTM parameters are not getting tracked.

Before you download the HTML/CSS code to embed your form, you must enable to Track Entries under the Share tab. Only then, the UTM parameters will be captured.

To know if you have done it right, check the HTML code that you have downloaded for input attributes such as:
<input type="hidden" name="utm_source" value=""/>
<input type="hidden" name="utm_medium" value=""/>
You must have such tags in the code for all the defined UTM parameters.