My MIL's home was sold during 2023 with my husband receiving his half of the proceeds. She passed a few years ago, so there was a difference in the home's value at the time of her passing and what it was sold for last year. We received a K-1 form, which I entered into our 1040 info here on FreeTax. As a result, what we owe to the IRS is over $20,000. Is this to be expected? We are in California as well as the home sold. Is there other forms we should have? Should we seek a tax professional to do our taxes instead? We are both retired so this tax owed is a surprise to us. Thanks for any direction you can give.