Yes agreed there is uncertainty but when HMRC is issuing advice regarding using postponed VAT in the event of "no deal" I'd have hoped you would be aware of this. The advice suggests it will affect the way VAT returns are completed.
I was hoping ClearBooks may be looking into this in preparation of "no deal" and be able to advise what this means.
Here is an extract of the HMRC advice we have received in regard to customs declarations and import VAT:
Delaying your supplementary declarations
To give you more time to adapt to these new processes, you can now choose to delay making your supplementary declarations until 4 October 2019 for standard goods imported up to 30 September. If you choose to make use of this delay you will need to ensure you record the details of the goods you move, so you can submit a declaration by the deadline.
If you choose to make use of this delay you will still have to report your import VAT. If you are VAT-registered, you should account for import VAT on your normal VAT returns using postponed VAT accounting. If you are not VAT-registered, we’ll write to you again soon to let you know how this will work.