If you deferred VAT payments between March 2020 and June 2020 under the VAT Payment Deferral Scheme you can be given the option to pay that in equal monthly instalments.
Today is the deadline if you want to spread your VAT payment across 11 months from April 2021 to March 2022.
If you have missed this deadline it’s not the end of the world.
Provided you sign up by 21st April 2021 you can spread the payment across 10 instalments. If you sign up by 19th May 2021 then it’s 9 payments; and sign up by 21st June 2021 (the closing date) then it is 8 payments.
Please note you need to apply for this yourself. Your accountant cannot do it for you.
Before you do join the scheme you will need to have a Government Gateway account and all outstanding VAT returns need to have been submitted.
Here is the link to opt into the deferral scheme:-