If you ever used your second home for business or rental purposes, you would need to split your business and personal use of the property. You would only enter the
personal portion as an investment sale. See
Business or Rental Property for more information on where to enter the business or rental portion.
If you received a
1099-S for your second home sale, you would split the
1099-S amounts between personal and business or rental use of the property.
If you didn't receive a
1099-S and sold your second home for a loss, you don't need to include the personal portion of the property as an investment sale because
personal property losses aren't deductible.