Is any of this debt pre 2018? (the old $1M limit applies to such grandfathered debt). That wouldn't explain why it is allowing > $1M)
Are you sure you correctly answered the TT questions about when the loans were initiated/refinanced?
I'd suggest you look at the Home Interest Worksheet for each loan and the overall Deductible Home Mortgage Worksheet. The former will let you verify your data entry and the latter will show you the limitation calculation so you can figure out where it went wrong. Usually it is a data entry issue.
Super easy to find in the Desktop TT version but for the online version like you are using I think you basically need to print a PDF with the right options. See this 2019 answer. Not sure if it still applies.
https://ttlc.intuit.com/community/after-you-file/discussion/where-are-the-worksheets-in-my-tax-retur...
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