Does the failure to disclose information concerning a commercial property deceptive business practices or possibly, fraud?

Texas. Commericial Lease states that leaseholder is responsible for lawyers fees & property taxes. Lease was vetted by a lawyer. Estimate given in the lease for the property taxes is 1/2 of the actual taxes. Landlord knew that the taxes were twice the estimate. They had already filed protest with the county commissioner's office two month's before the lease was signed. If the leaseholder had known that the property taxes were double the estimate and the landlord was pursuing legal action, thereby incurring legal fees that the leaseholder is responsible for, they would not have signed the lease