I am selling a home and want to understand tax implications. I've owned it for 12 years - for 5 of those it was rented as income property, but the rest of the time my own parents have lived there and I didn't collect rent
No, a home you don't live in is not your residence. You would not be eligible for the exclusion of gain for the sale of a primary residence. In addition, since your house was a rental it may be subject to depreciation recapture on the depreciation you took, or were entitle to take.
Thank you. Can you confirm when you say "you would not be eligible for the exclusion of gain for sale" do you mean to say I will pay capital gains tax? I should add that the home is Nevada, which from what I understand doesn't apply capital gains tax anyway. Is that right?
Yes, you are correct. Nevada doesn't have a capital gains tax, and yes, you may still have to pay a capital gains tax on your federal tax return.
What DavidD66 means is that you can't exclude a portion of your proceeds from the sale of your home if you don't meet the requirements. The three tests that you must meet are:
If you meet these requirements, you don't have to pay taxes on the first $250,000 (500,000 if you are married and file a joint tax return). If your profit is more than $250,000 ($500,000 if MFJ) then, the excess is reported on Schedule D as a capital gain.
From what you describe, you're not able to exclude any profit because even though you owned your home, you didn't meet the three requirements.
For additional information, refer to the TurboTax article Tax Aspects of Home Ownership: Selling a Home and the IRS article Topic no. 701, Sale of your home.