Taxpayers can pay using American Express, Discover, MasterCard or Visa. Payments can typically be made via phone, the Internet or through tax preparation software. The IRS website page  Pay taxes by credit or debit card  provides details and current prices.
Taxable Dependents. A taxable dependent is a person who is eligible to be claimed as a dependent, but still earns an income. Claiming a dependent earns a taxpayer a $3,650 tax exemption, according to the IRS.
The meaning depends upon the context. Generally speaking, however, it means people who depend upon you for their support and welfare. When filling out her tax return, for example, a single mother with four young children living with her lists those children as her dependents.