Solved
How do I record a payment into the bank from HMRC, for Self-Employment Income Support Scheme (COVID-19)?
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I've set up a new account code called "HMRC Grant" within "Other Income" - better to give it a clear name and position than leave as uncategorised. As you say, given it's taxable, it'll be in your P&L and part of your taxable profits for the year (if you make any in the current circumstances - ha, ha, gallows humour!)
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