Can August handle my UK tax records from abroad?

Yes. Rent from a UK property stays within HMRC's reach wherever you live, and August keeps the records ready for that: every payment and expense logged in HMRC-recognised categories from day one, quarterly submissions direct from the app, and Excel, CSV and PDF exports for an accountant in either country. August doesn't give tax advice or file Non-Resident Landlord Scheme paperwork for you, but it does mean the numbers are already in order when you or your accountant sit down to file.