@kelly20814
So your install (WordPress) is a subdirectory of the public_html (root directory), makes sense why WordPress URL is domain.com/wordpress. Yeah, you would edit the .htaccess in the WordPress folder. The issue could be the install is a subdirectory and not installed in the root directory, maybe that’s why the scanner is returning a 404. I’m not sure though. You can contact Sucuri via their website and see if that’s a factor in the plugin and Sucuri’s Sitecheck feature returning a 404.
But yeah, since your install is in a folder labeled WordPress as a subdirectory of the root directory of public_html folder, your WordPress Address (URL) should be https://www.dhandyman.com/wordpress. Also, you would edit the .htaccess file in the WordPress folder (like you said you were doing). Sorry for the confusion, I wasn’t clearly thinking (late night early morning – tired).
Like I said, try contacting Sucuri via their website about it and let them know the plugin returns of a 404 when performing a scan and let them know about your site being installed in a subdirectory. You have better luck contacting them on their website than here. I haven’t seen anyone from Sucuri respond to the support forums here in a awhile.
Although, I don’t have an issue with the plugin performing a scan in WordPress installs under subdomains so not sure what the issue could be.