What type of form do you have? A form 1098 for mortgage interest paid? A Form 1099-INT for interest income? It is not typical for the form not to show a name of an institution or person who issued it.
In TurboTax, you enter the 1099 issuer's name (payer) in the "Wages & Income" section under the specific 1099 type (e.g., 1099-NEC, 1099-MISC) by selecting "I'll type it in myself" if prompted to import. The name and address of the payer appear on the form in the "Payer's name, street address" box.
Assuming you know which payer or lender provided you the form, enter that company or individual's name in TurboTax when you enter the mortgage interest paid or interest income received.
Enter Interest Income in the Wages and Income section, and the name in the Received From space.
Enter Mortgage Interest paid under Deductions and Credits, and the name in the space for Lender name.
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