Q. Is this considered business or main home sale?
A. Simple answer: home sale, because you meet the 2 year rule. To qualify for the home sale exclusion, of the capital gain on the sale, you must have owned and lived in the home, as you principal residence 2 of the 5 years prior to sale. That 5 year period started Aug 2016. Since you lived in the home Aug 2016 to Nov 2018 (27 months), you meet that rule.
However, taxes aren't simple. It's really both a home sale and a business asset sale. That is, you must pay tax on the depreciation "recapture". You were allowed to deduct depreciation against rental income while you were renting it out. When you sell, you must report the "recapture" as income. It is taxed at ordinary income rates (not capital gains rate) but with a 25% max.
The easiest way to report it in TurboTax, is to report the sale as a home sale. The interview will ask about depreciation, previously claimed. You make only one entry for the total depreciation allowed or allowable.
If you did not claim depreciation, while renting it out, you must still recapture the depreciation your shoulda claimed. See https://ttlc.intuit.com/turbotax-support/en-us/help-article/asset-depreciation/didnt-take-depreciati...
