Where do I enter mortgage interest I received from a private mortgage I hold?

[MinhT1]

You enter mortgage interest received just AS IF you had received a form 1099-INT from a bank.

In TurboTax, you can enter your form 1099-INT by following these steps:

• In TurboTax, open your tax return
• Click on Federal in the left-hand column, then on Wages & Income on top of the screen
• Scroll down to All Income, locate the section Interest and Dividends and click on Show more
• Click Start next to Interest on 1099-INT.

[rtichy2]

Why is there a separate prompt for investment gains and losses that were not reported on a 1099-B, but not a similar prompt for interest not reported on 1099-INT?  Also, seller-financed mortgages are way down the list, but could possibly handle private mortgage entry?  (Idea being there is private interest, not reported on a 1099, but the mortgage holder was not a property seller, at all?)

[Critter-3]

Use the seller-financed mortgage section  even if you did not sell the property. 

[DaktariJF]

I see 2 very different answers here for reporting interest from a private mortgage when you are not the seller:

1- Just report it as if there is a 1099-INT (though there isn't one)

2- Report it as a seller-financed mortgage, even if you are not the seller (which seems inaccurate)

Which is the best method for this quite common situation where a mortgage (loan secured by real property and recorded a such)  is held by a third party such as a parent or relative or business associate, but not by a bank, or by the seller of the property?

Further clarification much appreciated!

[Critter-3]

Use option 2 since you must report the name/address/SS# of the payer since you are holding a mortgage.  The payer must report YOUR name/address/SS# on their Sch A if they want to deduct the mortgage interest they are paying you.  Doing this cross references the payments from them to you for the IRS.   

Use option 1  only if you are holding a loan that is NOT for a mortgage where you are holding the paper/lien.