Correcting Depreciation Form 3115

Hello,

 

I missed taking deprecation on a rental property for years 2014-2018.   I have already filed my 2018 taxes which were accepted.  After I filed my 2018 taxes I realized I missed taking depreciation for years 2014-2018.  

 

Do I amend my 2018 taxes with the missed depreciation for year 2018 AND complete Form 3115 for years 2014-2017?  OR

 

Do I amend my 2018 taxes with taking the missed depreciation for years 2014-2018 all on Form 3115? OR

 

Do I amend my 2018 Taxes with the missed depreciation only for year 2018 AND amend my 2017 taxes with Form 3115 for the missed years of 2014-2017. 

 

Thanks!