If you are wondering why it might be taking soooooo long for items to update in Dropbox today it is due to them undertaking some maintenance work. Anything you save should eventually go from the 'blue' waiting to save to 'green' saved signal, it just may take an hour or two.
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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