How do i manage my online account when suddenly everything disappeared and when i log into my turbotax account- my intuit prepaid card info is inaccessible (nervous)

  You have to access your own account and/or  print it for yourself using exactly the same account and user ID that you used when you prepared the return.

https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/01/27010

Many people have multiple TT accounts and forget how to access them.  Log out of the account you are in now.

Account recovery

https://myturbotax.intuit.com/account-recovery/

https://ttlc.intuit.com/questions/1901535-forgot-your-turbotax-online-user-id-or-password

Or did you use the desktop version of TurboTax?  If so, the files are on your own hard drive or any backup device you used like a flash drive.

https://ttlc.intuit.com/questions/1901486-how-many-turbotax-accounts-do-i-have

https://ttlc.intuit.com/questions/1901535

https://ttlc.intuit.com/questions/1901659-find-your-tax-data-file-in-mac

https://ttlc.intuit.com/questions/1900721-find-your-tax-data-file-tax-file-in-windows

To get a copy of your previously filed returns prepared with online TurboTax https://ttlc.intuit.com/questions/1900748-how-do-i-get-a-copy-of-a-return-i-filed-in-turbotax-online

Your TurboTax online account does not have information about your prepaid Visa.

For help with your pre-paid Visa card: 

Call  (888) 285-4169

There is a “Help” link in the top corner of the web site for the card:

https://www.turboprepaidcard.intuit.com/

LOST CARD

Ignore the prompt asking for your card number.  Choose #1 for lost, stolen, or cards never received, then choose #2, enter SS# if prompted and continue following the instructions.

The Turbo® Visa® Debit Card is provided by Green Dot Corporation and is issued by Green Dot Bank pursuant to a license from Visa U.S.A Inc. Green Dot Corporation is a member service provider for Green Dot Bank, Member FDIC. Visa is a registered trademark of Visa International Service Association. Green Dot Bank operates under the following registered trade names: GoBank, Green Dot Bank and Bonneville Bank. All of these registered trade names are used by, and refer to, a single FDIC-insured bank, Green Dot Bank. Deposits under any of these trade names are deposits with Green Dot Bank and are aggregated for deposit insurance coverage. Green Dot is a registered trademark of Green Dot Corporation.