I am not honestly sure what exactly is required and should be logged in regards to IF/ IFR, which is why I have logged both until now. I heard there was a 4/1 IFR/IF conversion factor but I also heard that that was being scrubbed.
And with regard to deducting time for taxi etc, I should have elaborated there to explain that I currently fly from an uncontrolled airfield and activate and IFR flight plan with the local ATSU about 5 minutes into flight. Perhaps it could all be logged but I am comfortable with logging it this way for the time being.