How do I enter my covid-19 repayment into line 23210 instead of 23200? The letter from CRA specifies that I use line 23210 instead of 23200 which is suggested on T4E.

I've entered my T4E as I should for the repayment in to boxes 26 and 30.  But i received a letter from the government specifying that the number shouldn't be entered in 23200 as the T4E suggest, it should be entered in 23210.  
The trouble I'm having is that I can't physically enter it in to 23210 and it just pops up in 23200.  Is there a way to change this?