Did you forget how to access your account? And....why is the IRS requesting a copy? Do they say you did not pay your 2018 tax due? Your only proof of payment will be your own bank/credit card records.
MULTIPLE ACCOUNTS/account recovery
Many people have multiple TT accounts and forget how to access them. Log out of the account you are in now.
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.
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
For steps on how to access a prior years return please click the link below.
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