Having completed our return today, it seems that there is a bug in the online software to be aware of.
If you see in the left panel that you have an annexe 2041-E
Firstly, note that it only relates to non-residents – so it should not have come up if you are a French resident. If it has and you not a non-resident, then you need to go back in to the Annexes page and uncheck the 2041-E line. Make sure it has been removed and then you will be able to proceed to the end - otherwise you you will find yourself in a deadly embrace with the system which won’t let you leave without providing information you can’t provide. As you progress through the return, make sure that 2041-E remains not listed in the annexes shown in the left pane. If it suddenly reappears then go back to Annexes selection page and uncheck it again.
The bug links to the completion of boxes 8SH and 8SI (S1 holders) on Form 2042 and dates back to the 2020 return (for revenues in 2019) which still seems to be present but doesn’t seem to affect everyone (which makes it difficult to resolve, I guess).
Analysing it, I cant help but think it occurred because I had forgotten to check 8SH and 8SI and went back to do that after which, I am almost certain, the 2041-E appeared in the left panel.