I had finished my taxes and was waiting to actually file. Next time I signed on and turbotax updated, my Fed taxes owed had increased by about $200. It appears their software had not correctly calculated my wife's social security benefits and several of my investment transactions. The first calculations were prior to Mar 15, 2021. The updated ones were in 2nd week of April 2021. I think Turbotax makes errors just like all of us. Hope this helps.