the form is 7004.
https://www.irs.gov/pub/irs-pdf/f7004.pdf
in box 1 put the code 25
complete the rest of the questions
for 6, 7 and 8 enter 0 which is most likely for an S-Corp.
file on or before 3/15/2025
according to Turbotax the form is contained in the program, so you would need to print it out and mail it
if Tutbotax doesn't supply a mailing address use the address on page 4 of the instructions
https://www.irs.gov/pub/irs-pdf/i7004.pdf