If you already filed your 2022 return, there is not much of a point.
You would most likely be better off filing the 3115 with your 2023 return (next year). Note that you need to file the 3115 with your tax return and also file a copy separately (a duplicate).
See https://www.irs.gov/instructions/i3115#en_US_202212_publink63215hd0e222
For the 481(a) adjustment, you will also need to file a statement detailing how you computed the adjustment and an explanation of the methodology used to determine it.
Again, you might want to consult a local tax professional next year.
