TurboTax can only be installed on a full Windows or Mac computer (running OSX 10.14 or later) - not an Ipad.
The TurboTax software can only be installed on a personal computer, desktop or laptop, not on a mobile device.
See this TurboTax website for mobile devices - https://turbotax.intuit.com/personal-taxes/mobile-apps/turbotax/
If you do not have access to a personal computer -
Go to this TurboTax website to request a refund for the software purchased from TurboTax - https://support.turbotax.intuit.com/forms/refund-request.jsp
Use this TurboTax website to check your orders and payments -
https://turbotax.intuit.com/personal-taxes/cd-download/order-status/
@Hvrd You cannot download or install desktop software to an iPad or any other mobile device. You need a full PC or Mac.