Working reduced hours? furloughed? TAX credits

The government has confirmed that if you are working reduced hours due to Covid-19 or are furloughed, your tax credits won't change as long as you're still employed or self employed. There is no need to tell HMRC about the change. You will be treated as working your normal houses until the Job Retention Scheme / Self Employed Income Support Scheme closes, even if you are not using either scheme.