While Texas is considered more debtor-friendly than most states (regular creditors cannot garnish), the State is absolutely within its rights to garnish your wages and intercept your tax refund
Texas:
From the link below: When you are eligible to receive money from the federal government, such as an income tax refund, that money can be diverted to repay your defaulted student loan(s). This is known as a Treasury offset and is required by federal law and regulations. http://www.tgslc.org/borrowers/default/consequences.cfm
From the link below: Texas law limits the amount that a creditor can garnish (take) from your wages for repayment of debts. The Texas wage garnishment laws (also called wage attachments) are even stricter than federal wage garnishment laws. In Texas, your wages may not be garnished by creditors except for child support, alimony, taxes, and student loans. http://www.nolo.com/legal-encyclopedia/texas-wage-garnishment-law.html
This is a very old post but I thought it was quite interesting to see how much has changed over a decade, now that we've had so much national student debt cancellation. Hopefully, in this instance, things worked out for our poster and perhaps maybe was able to obtain some later debt relief.