Official guides from DeductibleDuck are here:
Desktop:
https://deductibleduck.com/docs/how-to-guides/import-turbotax-win-mac-desktop/
Online:
https://deductibleduck.com/docs/how-to-guides/import-turbotax-online/
And for those curious about Form 8283:
https://deductibleduck.com/docs/how-to-guides/why-we-cant-fill-form-8283/
