-Individual income tax returns are typically due April 15, unless the date falls on a weekend or holiday (or you file Form 4868 seeking an extension until October 15).
-Independent contractors, gig workers, and self-employed people usually have to make quarterly estimated tax payments at pre-set dates throughout the year.
-Partnership (including multi-member LLCs) and S-Corp filing deadlines are typically March 15, unless they operate on a fiscal year basis. A six-month extension can be requested using Form 7004.
-The C-corp filing deadline is typically April 15, unless it operates on a fiscal year basis. A six-month extension can be requested using Form 7004.