Thanx. I agree that I'm good enough to go for 2020. They did their own returns before me. They hired me to prepare their biz returns about 2009 (NOT the biz that sends this K-1). A few years later, they added their personal returns. No 6198 in prior personal returns; I always ask for three years. The husband who had been preparing their returns developed early-onset Alzheimer's. The K-1s without basis info come from wife's father's two businesses for which he prepares the tax returns, filing on paper to Ogden; father must be at least in his mid-80s.
Thank you, everyone. I managed to get parents' return enough to lock down their tax rate and have their investments entered, and got sister's investments entered and return ready to proofread. So, I let software calculate brother's return with Kiddie Tax. He eSigned, and I e-filed. He flies off to Jordan on Tuesday to start his Fulbright program. Whew! Now to start reading up on Fulbright Scholarship taxation...
Again, thank you, everyone who helped on my two frantic topics this week.