Self Assessment Deadlines and Late Filing Penalties

TL;DR

• The four key dates
• Avoiding penalties

Registration and UTR

• When to register
• UTR timing

Filing deadlines

• Paper vs online
• First-year quirks

Payment deadlines

• Balancing payment
• Payments on account

Penalties and appeals

• Late filing
• Late payment

Checklist

• Register
• File
• Pay