Do I Need to Include Both Single Federal Returns or the Mock Return When Filing California State Taxes by Mail for a Registered Domestic Partnership?
Notice and procedure when forgetting to include IP PIN on paper return, and why is the refund status checker using line 34 instead of 35a?
E-File is not available because your tax return includes a tax situation that can't be e-filed. Make sure to mail your return by your state's due date.
California State tax filing by mail - why are the instructions asking to include Forms W-2G,592-B, 593?