Hello and thank you for using Just Answer,As you are in Texas that is the state that is used for any charge. If you need to charge sales tax on the service you provide depends on the service itself. Some are required for sales tax.
A company engaged in business in Texas that provides a taxable service in this state is required to obtain a sales tax permit and to collect state and local sales and use tax. Generally, tax is due on the entire amount charged for a taxable service, including items such as labor, materials and mileage charges, even if separately stated.
You can use this publicationhttp://www.window.state.tx.us/taxinfo/taxpubs/tx96_259.pdfto see if your service is a taxable service in Texas.
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