I am not quite sure if I understand the question.
If your house is being sold because of not paying back real estate taxes, then if you do not want to lose your house, you need to pay the taxes, late fees etc right now.
If you cannot come up with the money in time, you have a right of redemption period. If the property was your principle residence ,then there is a 2 year redemption period in Texas. To redeem ownership, however, the investor (who paid off the tax lien) must be repaid in full the entire amount they bid at auction plus any other fees or expenses incurred, and an additional 25 percent penalty on the total.
If you are selling your property and the closing occurs after the taxes are due, your title agency will prorate them and you will pay your share including any late fees.
Simon Campbell - http://www.bankforeclosuressale.com