My client switched from using a limited company to being self employed for 2017-2018 and 2018-2019.
He was late providing his bank statements and details of transactions so I put in estimates and then after mid March 2020 I submitted revised tax returns.
HMRC are saying they are not accepting revised tax returns for grant purposes. They seem to be happy to accept them for paying tax though!
There is a number to call to discuss problems but it is too busy.
I can understand HMRC being wary of late revised tax returns but there's no mention of the disallowance of these claims in the legislation.