Tax rate effective to date

Hi All,

As per business requirement we have reduced our tax rate from 19 to 16% but now from Jan-21 business want to increase it to 19%. Is there any option that to remove end date for 19% so that it will be calculate 19%. Or we need to define new tax rates only as it is overlapped if we remove end date for 19%?

Any pointers on this highly appreciated.

Thanks in advance.