After you file

if you used online log into your account. instructions for online account recovery if you don't remember your id or password

https://ttlc.intuit.com/turbotax-support/en-us/help-article/security-risk/account-recovery-request-t... 

if you used a desktop version the tax file will only exist of your computer. open the program and then you can print it. contact support if you uninstalled the program.  if you deleted the tax file (xxxxxx.tax20xx) then only the IRS will have a copy.