written instruments); Mantis, 5 S.W.3d at 392 (sworn account is a written instrument). If the instrument in writing is attached to the plaintiffs petition and if the amount of damages can be calculated from the allegations in the petition, judgment should be entered for that amount against the defaulting defendant. First Nat’l Bank v. Shockley, 663 S.W.2d 685, 688 (Tex.App.—Corpus Christi 1983, no writ). Here, the amount of delinquent ad valorem taxes could be calculated from appellees’ petitions and attached documentation. Moreover, the tax rolls and tax statements attached to appellees’ petitions and filed with the court constituted prima facie evidence of appellees’ claims. See Tex.Tax Code Ann. § 33.47(a) (Vernon Supp.2001); Davis v. City of Austin, 632 S.W.2d 331, 333 (Tex.1982) (<HOLDING>). By presenting copies of delinquent tax rolls
holding the plaintiff satisfies the burden of a prima facie case by a preponderance of the evidence holding that the taxing authority established its prima facie case as to every material fact necessary to establish the cause of action when it introduced a copy of the delinquent tax record certified by the proper taxing authority to be true and correct with the amount stated thereon to be unpaid holding that the trial court properly dismissed the entire multicount complaint because the plaintiff failed to establish a prima facie case as to any of the counts recognizing that loan documents introduced by petitioning creditors were sufficient to establish prima facie validity of claims holding that the simple assertion that the district of columbia failed to follow the proper procedures in selling a property for delinquent taxes without citing supporting evidence is insufficient to establish a prima facie defense under rule 60b