Pfizer (PFE) did a share spinoff into Viatris (VTRS) by joining Mylan with Pfizer’s Upjohn. I received a few shares, whole and fractional, and my brokerage sold the fractional. At tax time, my brokerage provided me with a .pdf which I loaded into Turbotax, but the .pdf did not provide the “cost basis” for the fractional 0.021 Viatris share sold and which I was credited for with $0.32. An error was detected and I was requested to add the missing information. How would I do that? As far as I understand, it goes something like this: When we say that…