Deadline to electronically sign the Form 5500 with the Department of Labor (DOL). Failure to sign the Form 5500 can result in penalties of up to $1,100 per day by the DOL and $15,000 by the IRS.
Deadline for filing the Form 5558, which extends the Form 5500 filing due date to
October 15.Deadline for filing the Form 5330 which is required when the plan must pay excise taxes generally associated with ADP/ACP refunds made after March 15 or late deferrals.
Deadline for sending Summary of Material Modification (210 days after end of plan year in which the amendment was adopted)
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Earlier Event: June 29
Eligible automatic enrollment plans process corrective distributions
Later Event: September 17
Extended deadline for filing S-Corporation and partnership tax returns