On the 1099 for your TX Teachers retirement, are the taxes withheld reflected on the 1099R? If so, make sure you entered the taxes withheld when you entered the 1099R form. If you have entered the 1099R income and the 1099R taxes withheld, and you still owe money, it is most likely correct.
To prevent this in the future, you will need to contact TX TRS and have your withholding changed on the your retirement income. Sometimes the amount withheld on retirement is not enough.
