Not sure what you are confused about almost everyone told you " parents adjusted bases".

Here are IRS rules.

If the FMV of the property at the time the donor made the gift is less than the donor's adjusted basis, your adjusted basis depends on whether you have a gain or loss when you dispose of the property.

• Your adjusted basis for figuring a gain is the donor's adjusted basis just before the donor made the gift, increased or decreased by any required adjustments to basis while you held the property.