Use this TurboTax website to check the status of an e-filed extension request and if it was either accepted or rejected - https://turbotax.intuit.com/tax-tools/efile-status-lookup/
See this TurboTax support FAQ for printing a Form 4868 - https://ttlc.intuit.com/community/printing/help/how-do-i-print-my-4868-extension-form-after-e-filing...
