10/07/2026
October 15th Deadline is next week.
Finish the Following:
Individual 1040 tax returns due for 2025 if extended
C-Corp 1120 tax returns due for 2025 if extended
2025 contributions due for SEPs or 401(k)s adopted by SMLLCs or sole proprietorships
Deadline for Solo 401(k)s with more than $250K in assets to file Form 5500-EZ if extended (Form 5558)
Deadline for self-directed IRAs with UBIT or UDFI to file Form 990-T tax return if extended
Medicare open enrollment period begins