In 2017, I filed form 6252 - Installment Sale Inc. - for the 1st yr. In 2018, I need to report 2nd yr's income - Part II of Form 6252. I'm using TT Online Premier. How?

I entered the original total sale information as prompted.  I was not prompted to enter how much of the proceeds I received during 2018.  So, at the moment, the summary shows the entire gain that will take place over 7 years, not just to gain for 2018?  If I recall, last year I was not able to complete the return online.  I had to download the TT software.