Retirement tax questions

When it asks if I took 2020 Qualified Disaster Distribution, I entered yes.

 

Following the instructions, I entered information from my 2020 8915-E form.  I opted to split my tax payment into 3 years and paid the FIRST 1/3 for 2020. Now I want to pay only the SECOND 1/3 for 2021, but it seems like turbotax forcing me to pay both the SECOND and THIRD portion in taxes for 2021.  Anybody else have this issue?  How can I fix this?