How will the government know where to automatic deposit my check if I don't have auto deposit on my tax return?

They won't.  I assume they will mail you one.

They won't, will mail you a check to the most recent address they have for you. Unless you get ss, then they might get your bank info from there or might just go with a mailed check..

The media stated if the IRS doesn't have your direct deposit information on file they will send you a paper check.

They we use last known address

They will send a paper check.

It will deposit it in your mail box.

Surveillance on where you bank?

At this time, its thought that those who did not use direct deposit will be mailed a paper check.