If I received LESS than $100,000 from my parents property sales (TRUST), do I need to claim in on my tax return?

Yes, you should report the sale on your income tax return if this was an inheritance. If you inherited the property and the value of the property did not increase from the date of sale versus the date your parents passed, you may not have any taxable income but you should report it on your income tax return, especially if you receive form 1099-S. 

• See Where do I enter the sale of a second home, an inherited home, or land on my 2021 taxes?

that depends on the type of trust and whether you'll be getting a k-1. in many cases the trustee has the discretion of determining whether the trust pays the tax on any sale of assets and then distributes proceeds to the beneficiaries or distributes the gain to the beneficiaries through the K-1.   ask the trustee.