Figuring maximum self-employment retirement account contributions for 2020

It appears that you have not yet changed the maximum allowable contribution amounts for solo 401k's. It's still telling me that the max contribution is $19,000, but it was increased to $19,500 for 2020; same for those of us over 50 - the increase is not showing yet. But my question is, why does the system not seem to understand that in addition to elective deferrals, solo 401k owners also make "employer" contributions, the max of which is based on the amount of self-employment income. Where it tells me how much more I may contribute for the year, it is leaving out the amount I paid in employer contributions.