What forms are used to file tax returns for a Business?

The deadline for filing tax returns for a business is March 17, 2025. The tax forms that need to be completed differ by the type of business:

• Partnership returns on Form 1065 with Schedule K-1 for each partner;
• Multiple-member LLC returns on Form 1065 with Schedule K-1 for each member;
• Corporation and S corporation returns on Form 1120 S with Schedule K-1 for each member.