Tax implications primary residence sale owner carry

[Tony F.]

Building a new house, Considering selling my current primary residence, I have lived in it 6 years, significant inveterate in value over that 6 years (~33% gain).

Since it’s my primary, if I sell, what is tax rate on gain?

Does carrying a note when selling the house change tax implications?

How long do I have to sell after moving out to realize this tax break? Won’t be renting but may take a couple months to move out.

Thanks!