Hi

This is my first time doing (S'CORP - 1065).I am filing a tax for 2021 initial business taxes, howvere, I am a bit confused as to which number they are asking of me to input . Not sure if it is the File Number on the Filing Receipt which is longer than 11 digits. It is 12 digits long or is it the one that says DOS ID-it is 7 digits long or is it the federal tax ID #? Please help! This question is on Client Details information. Thank you