Retirement tax questions

I followed exact procedure described in this link.

https://thefinancebuff.com/mega-backdoor-roth-in-turbotax.html#:~:text=A%20mega%20backdoor%20Roth%20....

 

The only difference is that my taxable income is some 0.13 cents in 1099-R, which makes taxable income zero.

I tried to change numbers in 1099-R temporarily just for testing so that I get $1 taxable income, then I see word ROLLOVER below 5a.