Mortgage refinance

I own an owner occupied investment property. I started the refinance in 2019 and didn't close until early 2020. So should I file the refinance as a 2019 return or wait until next year to file? And on the settlement statement, I saw pre-paid interest covered both 2019 and 2020. Can I write off interest on those 2019 portion this year? If so, where do I enter them on TurboTax Home & Business?

Thanks for your help!

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