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CH160300 - Reasonable excuse: examples of reasonable excuse - GOV.UK
HMRC updates reasonable excuse guidance | AccountingWEB
Is coronavirus a valid excuse for missing the tax return deadline?
Disagree with a tax decision: Reasonable excuses - GOV.UK
The Government response to covid-19: fixed penalty notices
COVID-19 – reasonable excuse and more time to appeal
A8.309 Coronavirus (COVID-19)—Reasonable Excuse And
HMRC to waive fines for people who file late tax returns due to ...
Bulk filing of Self Assessment Appeals for multiple clients - GOV.UK
COVID-19: tax penalties and appeals relaxations - LITRG