It sounds like TurboTax is treating your loan as two separate loans like you suggest if your interest is being limited. Double check that you've done the following:
- For the first loan (january - july) make sure you:
- Answered "YES" to the question "Was this loan paid off or refinanced with a different lender in 2018?"
- Put the 01/01/2018 balance as your balance at the beginning of the year, and ending balance as the amount that was transferred to the new lender
- For the second loan (july - december) make sure you:
- Put the 01/01/2018 balance as $0 and ending balance as the $750k
