How to amend an amended return that has been accepted?

I submitted my original 2021 return, and it was accepted and my payment made.  Then I discovered an error which provided me a refund.  I submitted an amended return.  It was accepted and received a refund.   Now, in 2024, I discovered another error I made and need to amend the 2021 return again?  What are the correct steps to create a second amendment?

 

What I have found is if I "edit" the original amendment, it just reduces the amount of the refund.  However, I go into TT and select amend a return, then use the amended file, I get a message "Filing another amendment means we have to make some changes to you previous amendment (Form 1040X)....."   I select continue and update/amend the return and I get the correct numbers.....ie my refund was reduced and this version show the correct payments.   Is this the correct way to create the 2nd amendment?