if it your a/c was indeed hacked in 2016 and you informed the IRS they should have sent you in each following year an ID protection pin - which identifies that you have been the victim of identity theft and to protect future years, when you file you need to enter the PIN. without the PIN no one can hack your a/c in future years. did you by chance do a nonfiler's return? that is a 2019 return so any other return you file for 2019 will be rejected saying something to the effect that a return has already been filed using your SSN.
TT can do nothing. You can call the IRS or retrieve your ID pin online. You will have to mail in your return and if you think this is a new instance of identity theft file form 14039
