As of all updates on 10/31/2022 Turbotax for PC does not show the "Line 5 worksheet" in forms. I downloaded the schedule 8812 instructions and filled it out. Not trivial- there are 12 lines in this worksheet. The result from my completing it agreed with the entry Turbotax put on line 5 for schedule 8812.
I think what is confusing for married filing jointly is Turbotax instructions do not emphasize that both spouses get a letter 6419 for the advance child tax credit payments and the amounts on both MUST BE ADDED TOGETHER and entered into the interview question for schedule 8812 line 14f. This is despite the fact that schedule 8812 is very clear for line 14f about having to add both together.
