How do I pay HMRC from Saral?

HMRC Dues → Payments: pick a quarter or tax month to select every filed line in it, set the payment date and create one run per tax (HMRC's accounts differ by tax, so a pick spanning two taxes makes two runs). A run waits for approval where your account requires a second person, then its bank file per paying bank is downloaded. A bank with no file format yet still joins a run and is paid by hand rather than written into a wrong file. A run reads Downloading until the file is in the browser, and a line turns Paid only when the server has seen the bank payment in Xero.