The attached screen shot from the council website has information about spreading your council tax payments over 12 months instead of 10 if you wish. It also has the email/telephone number if you need to make additional enquires. It is usually better to do so as soon as possible.
There is also a link to a document about other support measures that may be available.
https://www.solihull.gov.uk/Portals/0/Coronavirus/Coronavirus-support-available-to-individuals.pdf
Ken Hawkins 