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@EST wrote:
...I thought I had, but a client emailed that it had not changed...

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Before you attempt to start the process for the year, you really need to test everything in Intuit Link both as the accountant and a client to understand how it works and that everything you set up is in order.  Can't emphasize that often enough.

How can you tell your client did not receive the questionnaire for 2020 and not 2019?  On the outset, there's not much difference between the two (although I haven't gone through these in details to compare) and these are really broad open questions.

If your client receive anything other than what you expected, that's a sign that you do not understand how Link works (or, at least, sufficiently well) because that would have been apparent from the screen you used to send the request.