You really need to retain an attorney to review your paperwork and help ensure that you recover your money. If you are owed more than $10,000, the claim could not be filed in small claims court, as the jurisdictional maximum of small claims court is only $10,000.
You may not even be a legitimate independent contractor. The Texas Workforce Commission has a test for whether or not a person is a real independent contractor or an employee masquerading as an independent contractor. You can review the Commission's test as well as the Internal Revenue Service's test at the following web links:
Texas Workforce Commission Test for independent contractor:
Internal Revenue Service test for independent contractor:
Since you are in the Dallas area, you may wish to take advantage of my free hour of consultation for new clients. If you make an appointment, please bring copies of your pertinent paperwork.
The first issue is whether you are actually an independent contractor. If you are an independent contractor then you need to look at the remedies available to you under your contract.
You will need to sue in the appropriate court, which is likely the county court or district court in the county in which you performed the work. I recommend hiring an attorney. Short of suing, I'm not sure whether you have many options.
The above statements are provided as general information and not intended as legal advice. Each matter has its own set of unique circumstances that cannot be adequately addressed without consultation. You are strongly advised to hire an attorney licensed to practice law in your state to represent you.