I have a client that received ERC for 2020 but never amended their 1120-S.  They also have available 179 expense after adding back wages for the ERC.  I think I can still amend the 2020 return to show the ERC but will the service allow me to take the additional 179 expense made available?  And will I have to paper file the amended return because it is outside the deadline?  Is there a better course of action?  Thanks for your help!