Case study 1
A scope agreed in writing before any return was opened
The client wanted a price on the first call and the honest answer was that it could not be given yet. The documents were read first: which authorities had a claim, which years were open with each, and which filings actually followed from that. The scope was then written down with the years and the returns named, and the fee fixed against it. What the engagement produced before any tax work started was a document both sides could point at, which is what makes a later argument about the bill unnecessary.
Case study 2
A file worked across two offices in two calendars
The returns sat with authorities on different continents and with different year ends. The file was worked from the two offices closest to those authorities, but with one practitioner answerable for the whole of it, so the sequencing decision was made once rather than negotiated between desks. The documents lived in one place and both sides drew on the same set. What it produced was a pair of returns built on identical underlying figures, and a record of which figure came from which source document.
Case study 3
A draft corrected at review before it went out
The preparer had applied a treatment that is right for the more common version of this situation and wrong for the one in front of them, which is what review exists to catch. The second practitioner queried the position, the facts were checked against the documents rather than against the assumption, and the return was rebuilt on the correct basis before anything was filed. The engagement produced a filed return that never needed amending, and a note on file recording why the less obvious treatment was the right one here.
Case study 4
A scope change priced as a second written quote
Part way through, a set of filings came to light that nobody had known about at the outset. The work stopped rather than continuing quietly into new territory. What the additional work involved was set out, priced, and sent as a separate quote, and the client decided whether to proceed with it now or deal with it later. The original scope was completed either way. What this produced was a client who was never presented with a bill larger than the figure they had already agreed to.
Case study 5
A handover taken on from a previous preparer mid-cycle
The file arrived part way through a year, with returns already filed on positions taken by someone else. The first work was not preparation but reconciliation: establishing what had been filed, on what basis, and whether those positions could be carried forward consistently. Most could and one could not, and carrying that one forward would have compounded an error rather than merely inheriting it. What the engagement produced was a documented statement of the opening position and a filing plan that did not rest on assumptions nobody could verify.
Case study 6
Correspondence after filing handled under the original scope
An authority wrote several months after filing, asking how one figure had been arrived at. Because the supporting document and the reasoning had been kept when the return was prepared, the reply was a matter of retrieving and explaining rather than reconstructing a year from memory. It was sent within the window the letter set. The engagement produced a closed query and, as a by-product, a demonstration of why the file is assembled the way it is rather than discarded once a return has been accepted.
Case study 7
Which Country Taxes the Salary
The employment article turns on where the work is done, who pays, and who bears the cost — three tests that can point in different directions. The file establishes all three before either return is drafted.
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Case study 8
Ten Years of Missed Returns Filed as One Engagement
Filing many years at once is a sequencing problem: carry-forwards, instalments and credits from the earliest year feed the latest. Filing them out of order is what turns a recoverable position into an assessed one.
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