In West Virginia, shipping, handling, and freight charges are typically included in the taxable sales price when they're part of a transaction involving tangible personal property. If you sell a product and charge for delivery, that delivery charge is subject to sales tax.
Charges for services separate from delivery—installation, maintenance, repair, assembly—are not automatically taxable just because they appear on the same invoice. They're only taxable if the service itself is independently taxable under West Virginia law.
Always separately state non-delivery charges on invoices. Lumping everything together risks the entire amount being presumed taxable in an audit. West Virginia Code §11-15-2 and related regulations govern this; consult the State Tax Department or a CPA for industry-specific guidance.