My 1099-INT has no street address (only a PO Box), but turbotax insists on a street address. Should I enter: "NOT on 1099"?

[LenaH]

No. When entering your 1099-INT, please choose the option to type it in yourself. You will not need to input an address.

Please follow the instructions below: 

1. Open your return.
2. Search 1099-INT with the magnifying glass tool.
3. On the page Let's import your tax info, click on enter a different way.
4. Click on 1099-INT box. 
5. Click on Type it in myself. 
6. Fill in the information as per your 1099-INT. 

I have attached a screenshot below for additional guidance.

[SteamTrain]

@lab8 

I think it's the Drag-Drop, or picture entry procedures that mess the entry up.

Don't try to enter it that way...Just enter it manually as @LenaH  provided above.  Far less muss/fuss and not prone to supposedly smart AI programming when pictures or drag-drop is used.