Jan 31 – Form 1099s

Filings required for rent, legal, and contractor payments for ≥ $600 in the year.
Deadline has passed. Late filings may incur penalties.

Mar 01 – Delaware franchise tax

Payment and filing required for being incorporated in Delaware.
Deadline has passed. Late filing penalty is $200 + 1.5% / mo interest.

Apr 15 – Income tax and R&D tax credits

Federal and state filings required for every company. No exceptions.
Deadline has passed. Late filing penalty and interests may accrue.