Notice CP523 - Installment Agreement Default
IRC Section: IRC § 6159
Response Deadline: 30 days
This notice informs you that you've defaulted on your installment agreement. The IRS may cancel the agreement and pursue full collection.
Common Triggers
- Missed payment
- Late tax return
- New balance due
Resolution Steps
- Step 1: Review why you defaulted (missed payment, late filing)
- Step 2: Contact us immediately to reinstate or modify
- Step 3: Make up the missed payment as soon as possible
- Step 4: Consider a new payment arrangement
- Step 5: Don't ignore this - agreement may be cancelled
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