Parents' rental sold; received portion of proceeds, how to file?

My parents added my sister and me to the title/deed to their home that they subsequently rented out.  I am a co-signer on the mortgage.  My father passed away in 2019 and my mother sold the rental property in 2020.

My sister and I each received 25% of the proceeds from the sale (less mortgage pay off).

For my taxes, how do I account for the receipt of these proceeds?  My parents claimed the rental income/schedule E on their taxes.  I never claimed anything.  Do I add it under "Stocks, MFs, Bonds, Other"?

If so, what do I claim as the sale proceeds and cost basis?  Just my portion?  Since it was a rental house, do I have to account for depreciation that they've taken in their schedule E as part of the basis?

I see that there is a check box for "some (or all) of the proceeds from this dale do not belong to me."  Reading that, I should file the sale as in it's entirety and check that box and deduct 75% of the proceeds, I'm assuming?

Am I better off logging this as inheritance instead of 25% real estate sale?  I'm not sure how to do that though.  I live in WA state so at least we don't have state income tax.

Any help is greatly appreciated.