Hello,
The reason why No. Series aren't incremented automatically for 2020 is because you have to create the Nos Series Line for this year.
In fact each year you need to increment a new line at No Series for the new year.
If you wish you are also able to create already the No. Series Lines for upper years too, system always take in account system date or work date to pick the right No. Series to use on flows processes for the year you are working.
Taken per base the sample you share the data that you need to update at that particular No Series Line will be:
Starting Date= 01/01/2020
Starting No. = MC20200001
Ending No. = MC20209999
I would advise you to take a look at all No. Series Lines in order to update the lines with the new No. Series to use in 2020.
Hope this can help you.