The corporate return is completed and filed separately from the personal return and it is due 3/15 every year unless you put it on extension. So did you just start a corporation or did you miss filing the 2020 return this year?
Once the corp return is complete it will issue a K-1 form to each owner to be filed on the personal tax return. If you work for the business you must also take a wage/salary and file payroll tax reports quarterly/annually and issue all the employees a W-2 in January.
