Delete the 1098 that was erroneously started. It will be listed in the forms list as Home Int Wkst (lender name). You can also delete it by searching for 1098. When you use the Jump to 1098 link, you should be taken to your mortgage summary, where you can delete any entries you made.
How to delete forms in TurboTax Online
How to delete forms in TurboTax Desktop
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