No information as to which type nor version of sage?
That said, this is not a sage forum so I suggest you try that, or better still the sage help files. There is a forced shutdown option but this can corrupt your files. Failing that you will need to ring sage, but I don't expect that will be necessary.
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Joanne
Winner of Bookkeeper of the Year 2015, 2016 & 2017
Thoughts are my own/not to be regarded as official advice,which should be sought from a suitably qualified Accountant.
You should check out answers with reference to the legal position