I filed using turbotax online and received a prepaid card but do I need to do anything else to receive my return on the card?

Make sure that you activate the card.  Then wait for the tax refunds to be deposited onto the card.

See this TurboTax support FAQ for the Turbo Prepaid Visa® Card - https://ttlc.intuit.com/questions/4139949-how-to-get-your-tax-refund-on-a-turbo-prepaid-visa-card

Use this TurboTax website to check the status of an e-filed return and if it was either accepted or rejected - https://turbotax.intuit.com/tax-tools/efile-status-lookup/

If accepted by the IRS use the federal tax refund website to check the refund status - https://www.irs.gov/refunds

If accepted by the state use this TurboTax support FAQ to check the state tax refund status - https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund