But, per that link, it confirms that the signature authorization Form 8453C is definitely supported In connection with e-filing the California Form 100. In fact, when I’ve completed the Form 100, it gives me the option to either mail or e-file, but when I select the file, it never gives me the opportunity to download and PDF the form 8453C. Instead it simply goes straight to e-filing. I am reluctant to do that because, there would be no signature authorization to accompany it.
