Q: Does Maryland Sales Tax apply to my monthly rate?

No. Here are the laws pertaining to Internet Access and purchases made over the Internet.

Internet Access Charges:
Telecommunications taxes are not subject to sales tax in Maryland; therefore, Internet access fees are not taxed.

Source: Maryland State Law Section 60-210

Sales of Goods Purchased Over the Internet:
In Maryland, sales of goods over the Internet are treated the same as sales of tangible personal property through more traditional channels and, therefore, subject to the rules of nexus and Maryland's sales/use tax laws.

Source: Maryland State Law Section 60-210

Information/Software Purchased via Downloading from the Internet:
Information downloaded from the Internet is not considered to be a transfer of tangible personal property and therefore not subject to the state's sales and use tax laws. However, if any disk-based back-up is provided, the transaction would be subject to the state's sales and use tax laws.

Source: Maryland State Law Section 60-210